20218975

素因数分解:

$5^2\times 7^1\times {\mathrm{31}}^1\times {\mathrm{3727}}^1$

素因数の和:3775

約数の個数: 24

約数和(自身を含む): 29585408

約数和(自身を除く): 9366433

約数列:

[1, 5, 7, 25, 31, 35, 155, 175, 217, 775, 1085, 3727, 5425, 18635, 26089, 93175, 115537, 130445, 577685, 652225, 808759, 2888425, 4043795, 20218975]

約数ペア:

[(1, 20218975), (5, 4043795), (7, 2888425), (25, 808759), (31, 652225), (35, 577685), (155, 130445), (175, 115537), (217, 93175), (775, 26089), (1085, 18635), (3727, 5425)]