18119740

素因数分解:

$2^2\times 5^1\times {\mathrm{643}}^1\times {\mathrm{1409}}^1$

素因数の和:2061

約数の個数: 24

約数和(自身を含む): 38137680

約数和(自身を除く): 20017940

約数列:

[1, 2, 4, 5, 10, 20, 643, 1286, 1409, 2572, 2818, 3215, 5636, 6430, 7045, 12860, 14090, 28180, 905987, 1811974, 3623948, 4529935, 9059870, 18119740]

約数ペア:

[(1, 18119740), (2, 9059870), (4, 4529935), (5, 3623948), (10, 1811974), (20, 905987), (643, 28180), (1286, 14090), (1409, 12860), (2572, 7045), (2818, 6430), (3215, 5636)]