28891289

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{139}}^1\times {\mathrm{1291}}^1$

素因数の和:1460

約数の個数: 16

約数和(自身を含む): 34728960

約数和(自身を除く): 5837671

約数列:

[1, 7, 23, 139, 161, 973, 1291, 3197, 9037, 22379, 29693, 179449, 207851, 1256143, 4127327, 28891289]

約数ペア:

[(1, 28891289), (7, 4127327), (23, 1256143), (139, 207851), (161, 179449), (973, 29693), (1291, 22379), (3197, 9037)]