21564020

素因数分解:

$2^2\times 5^1\times {\mathrm{739}}^1\times {\mathrm{1459}}^1$

素因数の和:2207

約数の個数: 24

約数和(自身を含む): 45376800

約数和(自身を除く): 23812780

約数列:

[1, 2, 4, 5, 10, 20, 739, 1459, 1478, 2918, 2956, 3695, 5836, 7295, 7390, 14590, 14780, 29180, 1078201, 2156402, 4312804, 5391005, 10782010, 21564020]

約数ペア:

[(1, 21564020), (2, 10782010), (4, 5391005), (5, 4312804), (10, 2156402), (20, 1078201), (739, 29180), (1459, 14780), (1478, 14590), (2918, 7390), (2956, 7295), (3695, 5836)]