21904965

素因数分解:

$3^3\times 5^1\times {\mathrm{211}}^1\times {\mathrm{769}}^1$

素因数の和:994

約数の個数: 32

約数和(自身を含む): 39177600

約数和(自身を除く): 17272635

約数列:

[1, 3, 5, 9, 15, 27, 45, 135, 211, 633, 769, 1055, 1899, 2307, 3165, 3845, 5697, 6921, 9495, 11535, 20763, 28485, 34605, 103815, 162259, 486777, 811295, 1460331, 2433885, 4380993, 7301655, 21904965]

約数ペア:

[(1, 21904965), (3, 7301655), (5, 4380993), (9, 2433885), (15, 1460331), (27, 811295), (45, 486777), (135, 162259), (211, 103815), (633, 34605), (769, 28485), (1055, 20763), (1899, 11535), (2307, 9495), (3165, 6921), (3845, 5697)]