21989511

素因数分解:

$3^2\times {\mathrm{29}}^1\times {\mathrm{173}}^1\times {\mathrm{487}}^1$

素因数の和:695

約数の個数: 24

約数和(自身を含む): 33115680

約数和(自身を除く): 11126169

約数列:

[1, 3, 9, 29, 87, 173, 261, 487, 519, 1461, 1557, 4383, 5017, 14123, 15051, 42369, 45153, 84251, 127107, 252753, 758259, 2443279, 7329837, 21989511]

約数ペア:

[(1, 21989511), (3, 7329837), (9, 2443279), (29, 758259), (87, 252753), (173, 127107), (261, 84251), (487, 45153), (519, 42369), (1461, 15051), (1557, 14123), (4383, 5017)]