20693920

素因数分解:

$2^5\times 5^1\times {\mathrm{13}}^1\times {\mathrm{9949}}^1$

素因数の和:9977

約数の個数: 48

約数和(自身を含む): 52655400

約数和(自身を除く): 31961480

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 65, 80, 104, 130, 160, 208, 260, 416, 520, 1040, 2080, 9949, 19898, 39796, 49745, 79592, 99490, 129337, 159184, 198980, 258674, 318368, 397960, 517348, 646685, 795920, 1034696, 1293370, 1591840, 2069392, 2586740, 4138784, 5173480, 10346960, 20693920]

約数ペア:

[(1, 20693920), (2, 10346960), (4, 5173480), (5, 4138784), (8, 2586740), (10, 2069392), (13, 1591840), (16, 1293370), (20, 1034696), (26, 795920), (32, 646685), (40, 517348), (52, 397960), (65, 318368), (80, 258674), (104, 198980), (130, 159184), (160, 129337), (208, 99490), (260, 79592), (416, 49745), (520, 39796), (1040, 19898), (2080, 9949)]