21631775

素因数分解:

$5^2\times {\mathrm{11}}^2\times {\mathrm{7151}}^1$

素因数の和:7183

約数の個数: 18

約数和(自身を含む): 29487696

約数和(自身を除く): 7855921

約数列:

[1, 5, 11, 25, 55, 121, 275, 605, 3025, 7151, 35755, 78661, 178775, 393305, 865271, 1966525, 4326355, 21631775]

約数ペア:

[(1, 21631775), (5, 4326355), (11, 1966525), (25, 865271), (55, 393305), (121, 178775), (275, 78661), (605, 35755), (3025, 7151)]