20918980

素因数分解:

$2^2\times 5^1\times {\mathrm{307}}^1\times {\mathrm{3407}}^1$

素因数の和:3723

約数の個数: 24

約数和(自身を含む): 44085888

約数和(自身を除く): 23166908

約数列:

[1, 2, 4, 5, 10, 20, 307, 614, 1228, 1535, 3070, 3407, 6140, 6814, 13628, 17035, 34070, 68140, 1045949, 2091898, 4183796, 5229745, 10459490, 20918980]

約数ペア:

[(1, 20918980), (2, 10459490), (4, 5229745), (5, 4183796), (10, 2091898), (20, 1045949), (307, 68140), (614, 34070), (1228, 17035), (1535, 13628), (3070, 6814), (3407, 6140)]