20256080

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19477}}^1$

素因数の和:19503

約数の個数: 40

約数和(自身を含む): 50720712

約数和(自身を除く): 30464632

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 520, 1040, 19477, 38954, 77908, 97385, 155816, 194770, 253201, 311632, 389540, 506402, 779080, 1012804, 1266005, 1558160, 2025608, 2532010, 4051216, 5064020, 10128040, 20256080]

約数ペア:

[(1, 20256080), (2, 10128040), (4, 5064020), (5, 4051216), (8, 2532010), (10, 2025608), (13, 1558160), (16, 1266005), (20, 1012804), (26, 779080), (40, 506402), (52, 389540), (65, 311632), (80, 253201), (104, 194770), (130, 155816), (208, 97385), (260, 77908), (520, 38954), (1040, 19477)]