30991723

素因数分解:

$7^1\times {\mathrm{31}}^1\times {\mathrm{251}}^1\times {\mathrm{569}}^1$

素因数の和:858

約数の個数: 16

約数和(自身を含む): 36771840

約数和(自身を除く): 5780117

約数列:

[1, 7, 31, 217, 251, 569, 1757, 3983, 7781, 17639, 54467, 123473, 142819, 999733, 4427389, 30991723]

約数ペア:

[(1, 30991723), (7, 4427389), (31, 999733), (217, 142819), (251, 123473), (569, 54467), (1757, 17639), (3983, 7781)]