18121640

素因数分解:

$2^3\times 5^1\times {\mathrm{449}}^1\times {\mathrm{1009}}^1$

素因数の和:1469

約数の個数: 32

約数和(自身を含む): 40905000

約数和(自身を除く): 22783360

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 449, 898, 1009, 1796, 2018, 2245, 3592, 4036, 4490, 5045, 8072, 8980, 10090, 17960, 20180, 40360, 453041, 906082, 1812164, 2265205, 3624328, 4530410, 9060820, 18121640]

約数ペア:

[(1, 18121640), (2, 9060820), (4, 4530410), (5, 3624328), (8, 2265205), (10, 1812164), (20, 906082), (40, 453041), (449, 40360), (898, 20180), (1009, 17960), (1796, 10090), (2018, 8980), (2245, 8072), (3592, 5045), (4036, 4490)]