21898917

素因数分解:

$3^5\times {\mathrm{227}}^1\times {\mathrm{397}}^1$

素因数の和:639

約数の個数: 24

約数和(自身を含む): 33030816

約数和(自身を除く): 11131899

約数列:

[1, 3, 9, 27, 81, 227, 243, 397, 681, 1191, 2043, 3573, 6129, 10719, 18387, 32157, 55161, 90119, 96471, 270357, 811071, 2433213, 7299639, 21898917]

約数ペア:

[(1, 21898917), (3, 7299639), (9, 2433213), (27, 811071), (81, 270357), (227, 96471), (243, 90119), (397, 55161), (681, 32157), (1191, 18387), (2043, 10719), (3573, 6129)]