639625550

素因数分解:

$2^1\times 5^2\times {\mathrm{67}}^1\times {\mathrm{431}}^1\times {\mathrm{443}}^1$

素因数の和:953

約数の個数: 48

約数和(自身を含む): 1212993792

約数和(自身を除く): 573368242

約数列:

[1, 2, 5, 10, 25, 50, 67, 134, 335, 431, 443, 670, 862, 886, 1675, 2155, 2215, 3350, 4310, 4430, 10775, 11075, 21550, 22150, 28877, 29681, 57754, 59362, 144385, 148405, 190933, 288770, 296810, 381866, 721925, 742025, 954665, 1443850, 1484050, 1909330, 4773325, 9546650, 12792511, 25585022, 63962555, 127925110, 319812775, 639625550]

約数ペア:

[(1, 639625550), (2, 319812775), (5, 127925110), (10, 63962555), (25, 25585022), (50, 12792511), (67, 9546650), (134, 4773325), (335, 1909330), (431, 1484050), (443, 1443850), (670, 954665), (862, 742025), (886, 721925), (1675, 381866), (2155, 296810), (2215, 288770), (3350, 190933), (4310, 148405), (4430, 144385), (10775, 59362), (11075, 57754), (21550, 29681), (22150, 28877)]