20021980

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{91009}}^1$

素因数の和:91029

約数の個数: 24

約数和(自身を含む): 45869040

約数和(自身を除く): 25847060

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220, 91009, 182018, 364036, 455045, 910090, 1001099, 1820180, 2002198, 4004396, 5005495, 10010990, 20021980]

約数ペア:

[(1, 20021980), (2, 10010990), (4, 5005495), (5, 4004396), (10, 2002198), (11, 1820180), (20, 1001099), (22, 910090), (44, 455045), (55, 364036), (110, 182018), (220, 91009)]