21109990

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{4463}}^1$

素因数の和:4524

約数の個数: 32

約数和(自身を含む): 42425856

約数和(自身を除く): 21315866

約数列:

[1, 2, 5, 10, 11, 22, 43, 55, 86, 110, 215, 430, 473, 946, 2365, 4463, 4730, 8926, 22315, 44630, 49093, 98186, 191909, 245465, 383818, 490930, 959545, 1919090, 2110999, 4221998, 10554995, 21109990]

約数ペア:

[(1, 21109990), (2, 10554995), (5, 4221998), (10, 2110999), (11, 1919090), (22, 959545), (43, 490930), (55, 383818), (86, 245465), (110, 191909), (215, 98186), (430, 49093), (473, 44630), (946, 22315), (2365, 8926), (4463, 4730)]