Q: What is the sum of all factors of the number 221,521,209 excluding 221,521,209?
A: 168,030,471
The factors of the number 221,521,209 are: 1, 3, 7, 13, 19, 21, 39, 49, 57, 91, 133, 147, 247, 273, 399, 637, 741, 931, 1729, 1911, 2793, 5187, 6101, 12103, 18303, 36309, 42707, 79313, 115919, 128121, 237939, 298949, 347757, 555191, 811433, 896847, 1506947, 1665573, 2434299, 3886337, 4520841, 5680031, 10548629, 11659011, 17040093, 31645887, 73840403, 221521209.
If you add them up, you will get the total of 221,521,377. Now subtract 221,521,209 to get 168,030,471