18490180

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{22549}}^1$

素因数の和:22599

約数の個数: 24

約数和(自身を含む): 39778200

約数和(自身を除く): 21288020

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820, 22549, 45098, 90196, 112745, 225490, 450980, 924509, 1849018, 3698036, 4622545, 9245090, 18490180]

約数ペア:

[(1, 18490180), (2, 9245090), (4, 4622545), (5, 3698036), (10, 1849018), (20, 924509), (41, 450980), (82, 225490), (164, 112745), (205, 90196), (410, 45098), (820, 22549)]