20451640

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{53}}^1\times {\mathrm{877}}^1$

素因数の和:952

約数の個数: 64

約数和(自身を含む): 51204960

約数和(自身を除く): 30753320

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 53, 55, 88, 106, 110, 212, 220, 265, 424, 440, 530, 583, 877, 1060, 1166, 1754, 2120, 2332, 2915, 3508, 4385, 4664, 5830, 7016, 8770, 9647, 11660, 17540, 19294, 23320, 35080, 38588, 46481, 48235, 77176, 92962, 96470, 185924, 192940, 232405, 371848, 385880, 464810, 511291, 929620, 1022582, 1859240, 2045164, 2556455, 4090328, 5112910, 10225820, 20451640]

約数ペア:

[(1, 20451640), (2, 10225820), (4, 5112910), (5, 4090328), (8, 2556455), (10, 2045164), (11, 1859240), (20, 1022582), (22, 929620), (40, 511291), (44, 464810), (53, 385880), (55, 371848), (88, 232405), (106, 192940), (110, 185924), (212, 96470), (220, 92962), (265, 77176), (424, 48235), (440, 46481), (530, 38588), (583, 35080), (877, 23320), (1060, 19294), (1166, 17540), (1754, 11660), (2120, 9647), (2332, 8770), (2915, 7016), (3508, 5830), (4385, 4664)]