20451580

素因数分解:

$2^2\times 5^1\times {\mathrm{47}}^1\times {\mathrm{21757}}^1$

素因数の和:21813

約数の個数: 24

約数和(自身を含む): 43864128

約数和(自身を除く): 23412548

約数列:

[1, 2, 4, 5, 10, 20, 47, 94, 188, 235, 470, 940, 21757, 43514, 87028, 108785, 217570, 435140, 1022579, 2045158, 4090316, 5112895, 10225790, 20451580]

約数ペア:

[(1, 20451580), (2, 10225790), (4, 5112895), (5, 4090316), (10, 2045158), (20, 1022579), (47, 435140), (94, 217570), (188, 108785), (235, 87028), (470, 43514), (940, 21757)]