17999891

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{223}}^1\times {\mathrm{887}}^1$

素因数の和:1130

約数の個数: 16

約数和(自身を含む): 22278144

約数和(自身を除く): 4278253

約数列:

[1, 7, 13, 91, 223, 887, 1561, 2899, 6209, 11531, 20293, 80717, 197801, 1384607, 2571413, 17999891]

約数ペア:

[(1, 17999891), (7, 2571413), (13, 1384607), (91, 197801), (223, 80717), (887, 20293), (1561, 11531), (2899, 6209)]