20128040

素因数分解:

$2^3\times 5^1\times {\mathrm{137}}^1\times {\mathrm{3673}}^1$

素因数の和:3821

約数の個数: 32

約数和(自身を含む): 45631080

約数和(自身を除く): 25503040

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 137, 274, 548, 685, 1096, 1370, 2740, 3673, 5480, 7346, 14692, 18365, 29384, 36730, 73460, 146920, 503201, 1006402, 2012804, 2516005, 4025608, 5032010, 10064020, 20128040]

約数ペア:

[(1, 20128040), (2, 10064020), (4, 5032010), (5, 4025608), (8, 2516005), (10, 2012804), (20, 1006402), (40, 503201), (137, 146920), (274, 73460), (548, 36730), (685, 29384), (1096, 18365), (1370, 14692), (2740, 7346), (3673, 5480)]