20859920

素因数分解:

$2^4\times 5^1\times {\mathrm{239}}^1\times {\mathrm{1091}}^1$

素因数の和:1343

約数の個数: 40

約数和(自身を含む): 48746880

約数和(自身を除く): 27886960

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 239, 478, 956, 1091, 1195, 1912, 2182, 2390, 3824, 4364, 4780, 5455, 8728, 9560, 10910, 17456, 19120, 21820, 43640, 87280, 260749, 521498, 1042996, 1303745, 2085992, 2607490, 4171984, 5214980, 10429960, 20859920]

約数ペア:

[(1, 20859920), (2, 10429960), (4, 5214980), (5, 4171984), (8, 2607490), (10, 2085992), (16, 1303745), (20, 1042996), (40, 521498), (80, 260749), (239, 87280), (478, 43640), (956, 21820), (1091, 19120), (1195, 17456), (1912, 10910), (2182, 9560), (2390, 8728), (3824, 5455), (4364, 4780)]