21315511

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{139}}^1\times {\mathrm{1153}}^1$

素因数の和:1318

約数の個数: 16

約数和(自身を含む): 25849600

約数和(自身を除く): 4534089

約数列:

[1, 7, 19, 133, 139, 973, 1153, 2641, 8071, 18487, 21907, 153349, 160267, 1121869, 3045073, 21315511]

約数ペア:

[(1, 21315511), (7, 3045073), (19, 1121869), (133, 160267), (139, 153349), (973, 21907), (1153, 18487), (2641, 8071)]