21790408

素因数分解:

$2^3\times {\mathrm{109}}^1\times {\mathrm{24989}}^1$

素因数の和:25104

約数の個数: 16

約数和(自身を含む): 41233500

約数和(自身を除く): 19443092

約数列:

[1, 2, 4, 8, 109, 218, 436, 872, 24989, 49978, 99956, 199912, 2723801, 5447602, 10895204, 21790408]

約数ペア:

[(1, 21790408), (2, 10895204), (4, 5447602), (8, 2723801), (109, 199912), (218, 99956), (436, 49978), (872, 24989)]