18444980

素因数分解:

$2^2\times 5^1\times {\mathrm{109}}^1\times {\mathrm{8461}}^1$

素因数の和:8579

約数の個数: 24

約数和(自身を含む): 39094440

約数和(自身を除く): 20649460

約数列:

[1, 2, 4, 5, 10, 20, 109, 218, 436, 545, 1090, 2180, 8461, 16922, 33844, 42305, 84610, 169220, 922249, 1844498, 3688996, 4611245, 9222490, 18444980]

約数ペア:

[(1, 18444980), (2, 9222490), (4, 4611245), (5, 3688996), (10, 1844498), (20, 922249), (109, 169220), (218, 84610), (436, 42305), (545, 33844), (1090, 16922), (2180, 8461)]