20191717

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{4721}}^1$

素因数の和:4788

約数の個数: 16

約数和(自身を含む): 25385472

約数和(自身を除く): 5193755

約数列:

[1, 7, 13, 47, 91, 329, 611, 4277, 4721, 33047, 61373, 221887, 429611, 1553209, 2884531, 20191717]

約数ペア:

[(1, 20191717), (7, 2884531), (13, 1553209), (47, 429611), (91, 221887), (329, 61373), (611, 33047), (4277, 4721)]