21507.0000000

素因数分解:

$5^3\times {\mathrm{17}}^2\times {\mathrm{113}}^1$

素因数の和:162

約数の個数: 24

約数和(自身を含む): 5459688

約数和(自身を除く): 1377563

約数列:

[1, 5, 17, 25, 85, 113, 125, 289, 425, 565, 1445, 1921, 2125, 2825, 7225, 9605, 14125, 32657, 36125, 48025, 163285, 240125, 816425, 4082125]

約数ペア:

[(1, 4082125), (5, 816425), (17, 240125), (25, 163285), (85, 48025), (113, 36125), (125, 32657), (289, 14125), (425, 9605), (565, 7225), (1445, 2825), (1921, 2125)]