21455225

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{61}}^1\times {\mathrm{1279}}^1$

素因数の和:1361

約数の個数: 24

約数和(自身を含む): 29521920

約数和(自身を除く): 8066695

約数列:

[1, 5, 11, 25, 55, 61, 275, 305, 671, 1279, 1525, 3355, 6395, 14069, 16775, 31975, 70345, 78019, 351725, 390095, 858209, 1950475, 4291045, 21455225]

約数ペア:

[(1, 21455225), (5, 4291045), (11, 1950475), (25, 858209), (55, 390095), (61, 351725), (275, 78019), (305, 70345), (671, 31975), (1279, 16775), (1525, 14069), (3355, 6395)]