18717881

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{103}}^1\times {\mathrm{1997}}^1$

素因数の和:2120

約数の個数: 16

約数和(自身を含む): 23272704

約数和(自身を除く): 4554823

約数列:

[1, 7, 13, 91, 103, 721, 1339, 1997, 9373, 13979, 25961, 181727, 205691, 1439837, 2673983, 18717881]

約数ペア:

[(1, 18717881), (7, 2673983), (13, 1439837), (91, 205691), (103, 181727), (721, 25961), (1339, 13979), (1997, 9373)]