18900000007

素因数分解:

$7^1\times {\mathrm{37}}^1\times {\mathrm{72972973}}^1$

素因数の和:72973017

約数の個数: 8

約数和(自身を含む): 22183784096

約数和(自身を除く): 3283784089

約数列:

[1, 7, 37, 259, 72972973, 510810811, 2700000001, 18900000007]

約数ペア:

[(1, 18900000007), (7, 2700000001), (37, 510810811), (259, 72972973)]