16440920

素因数分解:

$2^3\times 5^1\times {\mathrm{139}}^1\times {\mathrm{2957}}^1$

素因数の和:3107

約数の個数: 32

約数和(自身を含む): 37270800

約数和(自身を除く): 20829880

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 139, 278, 556, 695, 1112, 1390, 2780, 2957, 5560, 5914, 11828, 14785, 23656, 29570, 59140, 118280, 411023, 822046, 1644092, 2055115, 3288184, 4110230, 8220460, 16440920]

約数ペア:

[(1, 16440920), (2, 8220460), (4, 4110230), (5, 3288184), (8, 2055115), (10, 1644092), (20, 822046), (40, 411023), (139, 118280), (278, 59140), (556, 29570), (695, 23656), (1112, 14785), (1390, 11828), (2780, 5914), (2957, 5560)]