21018850

素因数分解:

$2^1\times 5^2\times {\mathrm{163}}^1\times {\mathrm{2579}}^1$

素因数の和:2754

約数の個数: 24

約数和(自身を含む): 39350160

約数和(自身を除く): 18331310

約数列:

[1, 2, 5, 10, 25, 50, 163, 326, 815, 1630, 2579, 4075, 5158, 8150, 12895, 25790, 64475, 128950, 420377, 840754, 2101885, 4203770, 10509425, 21018850]

約数ペア:

[(1, 21018850), (2, 10509425), (5, 4203770), (10, 2101885), (25, 840754), (50, 420377), (163, 128950), (326, 64475), (815, 25790), (1630, 12895), (2579, 8150), (4075, 5158)]