18998180

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{71}}^1\times {\mathrm{787}}^1$

素因数の和:884

約数の個数: 48

約数和(自身を含む): 42892416

約数和(自身を除く): 23894236

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 71, 85, 142, 170, 284, 340, 355, 710, 787, 1207, 1420, 1574, 2414, 3148, 3935, 4828, 6035, 7870, 12070, 13379, 15740, 24140, 26758, 53516, 55877, 66895, 111754, 133790, 223508, 267580, 279385, 558770, 949909, 1117540, 1899818, 3799636, 4749545, 9499090, 18998180]

約数ペア:

[(1, 18998180), (2, 9499090), (4, 4749545), (5, 3799636), (10, 1899818), (17, 1117540), (20, 949909), (34, 558770), (68, 279385), (71, 267580), (85, 223508), (142, 133790), (170, 111754), (284, 66895), (340, 55877), (355, 53516), (710, 26758), (787, 24140), (1207, 15740), (1420, 13379), (1574, 12070), (2414, 7870), (3148, 6035), (3935, 4828)]