21136450

素因数分解:

$2^1\times 5^2\times {\mathrm{79}}^1\times {\mathrm{5351}}^1$

素因数の和:5442

約数の個数: 24

約数和(自身を含む): 39818880

約数和(自身を除く): 18682430

約数列:

[1, 2, 5, 10, 25, 50, 79, 158, 395, 790, 1975, 3950, 5351, 10702, 26755, 53510, 133775, 267550, 422729, 845458, 2113645, 4227290, 10568225, 21136450]

約数ペア:

[(1, 21136450), (2, 10568225), (5, 4227290), (10, 2113645), (25, 845458), (50, 422729), (79, 267550), (158, 133775), (395, 53510), (790, 26755), (1975, 10702), (3950, 5351)]