18640220

素因数分解:

$2^2\times 5^1\times {\mathrm{137}}^1\times {\mathrm{6803}}^1$

素因数の和:6949

約数の個数: 24

約数和(自身を含む): 39435984

約数和(自身を除く): 20795764

約数列:

[1, 2, 4, 5, 10, 20, 137, 274, 548, 685, 1370, 2740, 6803, 13606, 27212, 34015, 68030, 136060, 932011, 1864022, 3728044, 4660055, 9320110, 18640220]

約数ペア:

[(1, 18640220), (2, 9320110), (4, 4660055), (5, 3728044), (10, 1864022), (20, 932011), (137, 136060), (274, 68030), (548, 34015), (685, 27212), (1370, 13606), (2740, 6803)]