21986908

素因数分解:

$2^2\times {\mathrm{157}}^2\times {\mathrm{223}}^1$

素因数の和:541

約数の個数: 18

約数和(自身を含む): 38897376

約数和(自身を除く): 16910468

約数列:

[1, 2, 4, 157, 223, 314, 446, 628, 892, 24649, 35011, 49298, 70022, 98596, 140044, 5496727, 10993454, 21986908]

約数ペア:

[(1, 21986908), (2, 10993454), (4, 5496727), (157, 140044), (223, 98596), (314, 70022), (446, 49298), (628, 35011), (892, 24649)]