21540969

素因数分解:

$3^2\times {\mathrm{67}}^1\times {\mathrm{139}}^1\times {\mathrm{257}}^1$

素因数の和:469

約数の個数: 24

約数和(自身を含む): 31930080

約数和(自身を除く): 10389111

約数列:

[1, 3, 9, 67, 139, 201, 257, 417, 603, 771, 1251, 2313, 9313, 17219, 27939, 35723, 51657, 83817, 107169, 154971, 321507, 2393441, 7180323, 21540969]

約数ペア:

[(1, 21540969), (3, 7180323), (9, 2393441), (67, 321507), (139, 154971), (201, 107169), (257, 83817), (417, 51657), (603, 35723), (771, 27939), (1251, 17219), (2313, 9313)]