21820540

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{155861}}^1$

素因数の和:155877

約数の個数: 24

約数和(自身を含む): 52369632

約数和(自身を除く): 30549092

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 155861, 311722, 623444, 779305, 1091027, 1558610, 2182054, 3117220, 4364108, 5455135, 10910270, 21820540]

約数ペア:

[(1, 21820540), (2, 10910270), (4, 5455135), (5, 4364108), (7, 3117220), (10, 2182054), (14, 1558610), (20, 1091027), (28, 779305), (35, 623444), (70, 311722), (140, 155861)]