15921521

素因数分解:

$7^2\times {\mathrm{11}}^1\times {\mathrm{109}}^1\times {\mathrm{271}}^1$

素因数の和:405

約数の個数: 24

約数和(自身を含む): 20465280

約数和(自身を除く): 4543759

約数列:

[1, 7, 11, 49, 77, 109, 271, 539, 763, 1199, 1897, 2981, 5341, 8393, 13279, 20867, 29539, 58751, 146069, 206773, 324929, 1447411, 2274503, 15921521]

約数ペア:

[(1, 15921521), (7, 2274503), (11, 1447411), (49, 324929), (77, 206773), (109, 146069), (271, 58751), (539, 29539), (763, 20867), (1199, 13279), (1897, 8393), (2981, 5341)]