21178220

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{151273}}^1$

素因数の和:151289

約数の個数: 24

約数和(自身を含む): 50828064

約数和(自身を除く): 29649844

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 151273, 302546, 605092, 756365, 1058911, 1512730, 2117822, 3025460, 4235644, 5294555, 10589110, 21178220]

約数ペア:

[(1, 21178220), (2, 10589110), (4, 5294555), (5, 4235644), (7, 3025460), (10, 2117822), (14, 1512730), (20, 1058911), (28, 756365), (35, 605092), (70, 302546), (140, 151273)]