The factors of the number 6,587,880 are: 1, 2, 3, 4, 5, 6, 8, 10, 12, 13, 15, 20, 24, 26, 30, 39, 40, 41, 52, 60, 65, 78, 82, 103, 104, 120, 123, 130, 156, 164, 195, 205, 206, 246, 260, 309, 312, 328, 390, 410, 412, 492, 515, 520, 533, 615, 618, 780, 820, 824, 984, 1030, 1066, 1230, 1236, 1339, 1545, 1560, 1599, 1640, 2060, 2132, 2460, 2472, 2665, 2678, 3090, 3198, 4017, 4120, 4223, 4264, 4920, 5330, 5356, 6180, 6396, 6695, 7995, 8034, 8446, 10660, 10712, 12360, 12669, 12792, 13390, 15990, 16068, 16892, 20085, 21115, 21320, 25338, 26780, 31980, 32136, 33784, 40170, 42230, 50676, 53560, 54899, 63345, 63960, 80340, 84460, 101352, 109798, 126690, 160680, 164697, 168920, 219596, 253380, 274495, 329394, 439192, 506760, 548990, 658788, 823485, 1097980, 1317576, 1646970, 2195960, 3293940, 6587880.
If you add them up, you will get the total of 6,587,895. Now subtract 6,587,880 to get 15,426,840