19979431059

素因数分解:

$3^1\times 7^2\times {\mathrm{135914497}}^1$

素因数の和:135914514

約数の個数: 12

約数和(自身を含む): 30988505544

約数和(自身を除く): 11009074485

約数列:

[1, 3, 7, 21, 49, 147, 135914497, 407743491, 951401479, 2854204437, 6659810353, 19979431059]

約数ペア:

[(1, 19979431059), (3, 6659810353), (7, 2854204437), (21, 951401479), (49, 407743491), (147, 135914497)]