The factors of the number 526,402,638 are: 1, 2, 3, 6, 9, 18, 19, 27, 38, 54, 57, 81, 109, 114, 162, 171, 218, 243, 327, 342, 486, 513, 523, 654, 981, 1026, 1046, 1539, 1569, 1962, 2071, 2943, 3078, 3138, 4142, 4617, 4707, 5886, 6213, 8829, 9234, 9414, 9937, 12426, 14121, 17658, 18639, 19874, 26487, 28242, 29811, 37278, 42363, 52974, 55917, 57007, 59622, 84726, 89433, 111834, 114014, 127089, 167751, 171021, 178866, 254178, 268299, 335502, 342042, 503253, 513063, 536598, 804897, 1006506, 1026126, 1083133, 1539189, 1609794, 2166266, 2414691, 3078378, 3249399, 4617567, 4829382, 6498798, 9235134, 9748197, 13852701, 19496394, 27705402, 29244591, 58489182, 87733773, 175467546, 263201319, 526402638.
If you add them up, you will get the total of 1,258,857,600.