18991540

素因数分解:

$2^2\times 5^1\times {\mathrm{149}}^1\times {\mathrm{6373}}^1$

素因数の和:6531

約数の個数: 24

約数和(自身を含む): 40156200

約数和(自身を除く): 21164660

約数列:

[1, 2, 4, 5, 10, 20, 149, 298, 596, 745, 1490, 2980, 6373, 12746, 25492, 31865, 63730, 127460, 949577, 1899154, 3798308, 4747885, 9495770, 18991540]

約数ペア:

[(1, 18991540), (2, 9495770), (4, 4747885), (5, 3798308), (10, 1899154), (20, 949577), (149, 127460), (298, 63730), (596, 31865), (745, 25492), (1490, 12746), (2980, 6373)]