20728547

素因数分解:

$7^1\times {\mathrm{37}}^1\times {\mathrm{163}}^1\times {\mathrm{491}}^1$

素因数の和:698

約数の個数: 16

約数和(自身を含む): 24529152

約数和(自身を除く): 3800605

約数列:

[1, 7, 37, 163, 259, 491, 1141, 3437, 6031, 18167, 42217, 80033, 127169, 560231, 2961221, 20728547]

約数ペア:

[(1, 20728547), (7, 2961221), (37, 560231), (163, 127169), (259, 80033), (491, 42217), (1141, 18167), (3437, 6031)]