20398889

素因数分解:

$7^1\times {\mathrm{89}}^1\times {\mathrm{137}}^1\times {\mathrm{239}}^1$

素因数の和:472

約数の個数: 16

約数和(自身を含む): 23846400

約数和(自身を除く): 3447511

約数列:

[1, 7, 89, 137, 239, 623, 959, 1673, 12193, 21271, 32743, 85351, 148897, 229201, 2914127, 20398889]

約数ペア:

[(1, 20398889), (7, 2914127), (89, 229201), (137, 148897), (239, 85351), (623, 32743), (959, 21271), (1673, 12193)]