21511259

素因数分解:

$7^1\times {\mathrm{11}}^2\times {\mathrm{109}}^1\times {\mathrm{233}}^1$

素因数の和:371

約数の個数: 24

約数和(自身を含む): 27387360

約数和(自身を除く): 5876101

約数列:

[1, 7, 11, 77, 109, 121, 233, 763, 847, 1199, 1631, 2563, 8393, 13189, 17941, 25397, 28193, 92323, 177779, 197351, 279367, 1955569, 3073037, 21511259]

約数ペア:

[(1, 21511259), (7, 3073037), (11, 1955569), (77, 279367), (109, 197351), (121, 177779), (233, 92323), (763, 28193), (847, 25397), (1199, 17941), (1631, 13189), (2563, 8393)]