21556731

素因数分解:

$3^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{60383}}^1$

素因数の和:60410

約数の個数: 16

約数和(自身を含む): 34781184

約数和(自身を除く): 13224453

約数列:

[1, 3, 7, 17, 21, 51, 119, 357, 60383, 181149, 422681, 1026511, 1268043, 3079533, 7185577, 21556731]

約数ペア:

[(1, 21556731), (3, 7185577), (7, 3079533), (17, 1268043), (21, 1026511), (51, 422681), (119, 181149), (357, 60383)]