21498040

素因数分解:

$2^3\times 5^1\times {\mathrm{137}}^1\times {\mathrm{3923}}^1$

素因数の和:4071

約数の個数: 32

約数和(自身を含む): 48736080

約数和(自身を除く): 27238040

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 137, 274, 548, 685, 1096, 1370, 2740, 3923, 5480, 7846, 15692, 19615, 31384, 39230, 78460, 156920, 537451, 1074902, 2149804, 2687255, 4299608, 5374510, 10749020, 21498040]

約数ペア:

[(1, 21498040), (2, 10749020), (4, 5374510), (5, 4299608), (8, 2687255), (10, 2149804), (20, 1074902), (40, 537451), (137, 156920), (274, 78460), (548, 39230), (685, 31384), (1096, 19615), (1370, 15692), (2740, 7846), (3923, 5480)]