21688220

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{34981}}^1$

素因数の和:35021

約数の個数: 24

約数和(自身を含む): 47015808

約数和(自身を除く): 25327588

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 310, 620, 34981, 69962, 139924, 174905, 349810, 699620, 1084411, 2168822, 4337644, 5422055, 10844110, 21688220]

約数ペア:

[(1, 21688220), (2, 10844110), (4, 5422055), (5, 4337644), (10, 2168822), (20, 1084411), (31, 699620), (62, 349810), (124, 174905), (155, 139924), (310, 69962), (620, 34981)]