16981564

素因数分解:

$2^2\times {\mathrm{821}}^1\times {\mathrm{5171}}^1$

素因数の和:5996

約数の個数: 12

約数和(自身を含む): 29759688

約数和(自身を除く): 12778124

約数列:

[1, 2, 4, 821, 1642, 3284, 5171, 10342, 20684, 4245391, 8490782, 16981564]

約数ペア:

[(1, 16981564), (2, 8490782), (4, 4245391), (821, 20684), (1642, 10342), (3284, 5171)]