21478107

素因数分解:

$3^1\times 7^1\times {\mathrm{47}}^2\times {\mathrm{463}}^1$

素因数の和:567

約数の個数: 24

約数和(自身を含む): 33511936

約数和(自身を除く): 12033829

約数列:

[1, 3, 7, 21, 47, 141, 329, 463, 987, 1389, 2209, 3241, 6627, 9723, 15463, 21761, 46389, 65283, 152327, 456981, 1022767, 3068301, 7159369, 21478107]

約数ペア:

[(1, 21478107), (3, 7159369), (7, 3068301), (21, 1022767), (47, 456981), (141, 152327), (329, 65283), (463, 46389), (987, 21761), (1389, 15463), (2209, 9723), (3241, 6627)]