81309620

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{29}}^1\times {\mathrm{2861}}^1$

素因数の和:2913

約数の個数: 72

約数和(自身を含む): 205548840

約数和(自身を除く): 124239220

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 29, 35, 49, 58, 70, 98, 116, 140, 145, 196, 203, 245, 290, 406, 490, 580, 812, 980, 1015, 1421, 2030, 2842, 2861, 4060, 5684, 5722, 7105, 11444, 14210, 14305, 20027, 28420, 28610, 40054, 57220, 80108, 82969, 100135, 140189, 165938, 200270, 280378, 331876, 400540, 414845, 560756, 580783, 700945, 829690, 1161566, 1401890, 1659380, 2323132, 2803780, 2903915, 4065481, 5807830, 8130962, 11615660, 16261924, 20327405, 40654810, 81309620]

約数ペア:

[(1, 81309620), (2, 40654810), (4, 20327405), (5, 16261924), (7, 11615660), (10, 8130962), (14, 5807830), (20, 4065481), (28, 2903915), (29, 2803780), (35, 2323132), (49, 1659380), (58, 1401890), (70, 1161566), (98, 829690), (116, 700945), (140, 580783), (145, 560756), (196, 414845), (203, 400540), (245, 331876), (290, 280378), (406, 200270), (490, 165938), (580, 140189), (812, 100135), (980, 82969), (1015, 80108), (1421, 57220), (2030, 40054), (2842, 28610), (2861, 28420), (4060, 20027), (5684, 14305), (5722, 14210), (7105, 11444)]