20787717

素因数分解:

$3^1\times {\mathrm{109}}^1\times {\mathrm{151}}^1\times {\mathrm{421}}^1$

素因数の和:684

約数の個数: 16

約数和(自身を含む): 28223360

約数和(自身を除く): 7435643

約数列:

[1, 3, 109, 151, 327, 421, 453, 1263, 16459, 45889, 49377, 63571, 137667, 190713, 6929239, 20787717]

約数ペア:

[(1, 20787717), (3, 6929239), (109, 190713), (151, 137667), (327, 63571), (421, 49377), (453, 45889), (1263, 16459)]