20901080

素因数分解:

$2^3\times 5^1\times {\mathrm{53}}^1\times {\mathrm{9859}}^1$

素因数の和:9923

約数の個数: 32

約数和(自身を含む): 47919600

約数和(自身を除く): 27018520

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 53, 106, 212, 265, 424, 530, 1060, 2120, 9859, 19718, 39436, 49295, 78872, 98590, 197180, 394360, 522527, 1045054, 2090108, 2612635, 4180216, 5225270, 10450540, 20901080]

約数ペア:

[(1, 20901080), (2, 10450540), (4, 5225270), (5, 4180216), (8, 2612635), (10, 2090108), (20, 1045054), (40, 522527), (53, 394360), (106, 197180), (212, 98590), (265, 78872), (424, 49295), (530, 39436), (1060, 19718), (2120, 9859)]