20514781

素因数分解:

$7^2\times {\mathrm{23}}^1\times {\mathrm{109}}^1\times {\mathrm{167}}^1$

素因数の和:313

約数の個数: 24

約数和(自身を含む): 25280640

約数和(自身を除く): 4765859

約数列:

[1, 7, 23, 49, 109, 161, 167, 763, 1127, 1169, 2507, 3841, 5341, 8183, 17549, 18203, 26887, 122843, 127421, 188209, 418669, 891947, 2930683, 20514781]

約数ペア:

[(1, 20514781), (7, 2930683), (23, 891947), (49, 418669), (109, 188209), (161, 127421), (167, 122843), (763, 26887), (1127, 18203), (1169, 17549), (2507, 8183), (3841, 5341)]