20642965

素因数分解:

$5^1\times 7^2\times {\mathrm{109}}^1\times {\mathrm{773}}^1$

素因数の和:901

約数の個数: 24

約数和(自身を含む): 29117880

約数和(自身を除く): 8474915

約数列:

[1, 5, 7, 35, 49, 109, 245, 545, 763, 773, 3815, 3865, 5341, 5411, 26705, 27055, 37877, 84257, 189385, 421285, 589799, 2948995, 4128593, 20642965]

約数ペア:

[(1, 20642965), (5, 4128593), (7, 2948995), (35, 589799), (49, 421285), (109, 189385), (245, 84257), (545, 37877), (763, 27055), (773, 26705), (3815, 5411), (3865, 5341)]