19757980

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{89809}}^1$

素因数の和:89829

約数の個数: 24

約数和(自身を含む): 45264240

約数和(自身を除く): 25506260

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220, 89809, 179618, 359236, 449045, 898090, 987899, 1796180, 1975798, 3951596, 4939495, 9878990, 19757980]

約数ペア:

[(1, 19757980), (2, 9878990), (4, 4939495), (5, 3951596), (10, 1975798), (11, 1796180), (20, 987899), (22, 898090), (44, 449045), (55, 359236), (110, 179618), (220, 89809)]