21017660

素因数分解:

$2^2\times 5^1\times {\mathrm{239}}^1\times {\mathrm{4397}}^1$

素因数の和:4645

約数の個数: 24

約数和(自身を含む): 44331840

約数和(自身を除く): 23314180

約数列:

[1, 2, 4, 5, 10, 20, 239, 478, 956, 1195, 2390, 4397, 4780, 8794, 17588, 21985, 43970, 87940, 1050883, 2101766, 4203532, 5254415, 10508830, 21017660]

約数ペア:

[(1, 21017660), (2, 10508830), (4, 5254415), (5, 4203532), (10, 2101766), (20, 1050883), (239, 87940), (478, 43970), (956, 21985), (1195, 17588), (2390, 8794), (4397, 4780)]