20321865

素因数分解:

$3^2\times 5^1\times {\mathrm{307}}^1\times {\mathrm{1471}}^1$

素因数の和:1789

約数の個数: 24

約数和(自身を含む): 35363328

約数和(自身を除く): 15041463

約数列:

[1, 3, 5, 9, 15, 45, 307, 921, 1471, 1535, 2763, 4413, 4605, 7355, 13239, 13815, 22065, 66195, 451597, 1354791, 2257985, 4064373, 6773955, 20321865]

約数ペア:

[(1, 20321865), (3, 6773955), (5, 4064373), (9, 2257985), (15, 1354791), (45, 451597), (307, 66195), (921, 22065), (1471, 13815), (1535, 13239), (2763, 7355), (4413, 4605)]