21162020

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{2237}}^1$

素因数の和:2300

約数の個数: 48

約数和(自身を含む): 49629888

約数和(自身を除く): 28467868

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 43, 44, 55, 86, 110, 172, 215, 220, 430, 473, 860, 946, 1892, 2237, 2365, 4474, 4730, 8948, 9460, 11185, 22370, 24607, 44740, 49214, 96191, 98428, 123035, 192382, 246070, 384764, 480955, 492140, 961910, 1058101, 1923820, 2116202, 4232404, 5290505, 10581010, 21162020]

約数ペア:

[(1, 21162020), (2, 10581010), (4, 5290505), (5, 4232404), (10, 2116202), (11, 1923820), (20, 1058101), (22, 961910), (43, 492140), (44, 480955), (55, 384764), (86, 246070), (110, 192382), (172, 123035), (215, 98428), (220, 96191), (430, 49214), (473, 44740), (860, 24607), (946, 22370), (1892, 11185), (2237, 9460), (2365, 8948), (4474, 4730)]