78898100

素因数分解:

$2^2\times 5^2\times {\mathrm{31}}^2\times {\mathrm{821}}^1$

素因数の和:897

約数の個数: 54

約数和(自身を含む): 177125382

約数和(自身を除く): 98227282

約数列:

[1, 2, 4, 5, 10, 20, 25, 31, 50, 62, 100, 124, 155, 310, 620, 775, 821, 961, 1550, 1642, 1922, 3100, 3284, 3844, 4105, 4805, 8210, 9610, 16420, 19220, 20525, 24025, 25451, 41050, 48050, 50902, 82100, 96100, 101804, 127255, 254510, 509020, 636275, 788981, 1272550, 1577962, 2545100, 3155924, 3944905, 7889810, 15779620, 19724525, 39449050, 78898100]

約数ペア:

[(1, 78898100), (2, 39449050), (4, 19724525), (5, 15779620), (10, 7889810), (20, 3944905), (25, 3155924), (31, 2545100), (50, 1577962), (62, 1272550), (100, 788981), (124, 636275), (155, 509020), (310, 254510), (620, 127255), (775, 101804), (821, 96100), (961, 82100), (1550, 50902), (1642, 48050), (1922, 41050), (3100, 25451), (3284, 24025), (3844, 20525), (4105, 19220), (4805, 16420), (8210, 9610)]