21156911

素因数分解:

${\mathrm{31}}^1\times {\mathrm{53}}^1\times {\mathrm{79}}^1\times {\mathrm{163}}^1$

素因数の和:326

約数の個数: 16

約数和(自身を含む): 22671360

約数和(自身を除く): 1514449

約数列:

[1, 31, 53, 79, 163, 1643, 2449, 4187, 5053, 8639, 12877, 129797, 267809, 399187, 682481, 21156911]

約数ペア:

[(1, 21156911), (31, 682481), (53, 399187), (79, 267809), (163, 129797), (1643, 12877), (2449, 8639), (4187, 5053)]