31781561

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{307}}^1\times {\mathrm{643}}^1$

素因数の和:980

約数の個数: 16

約数和(自身を含む): 38083584

約数和(自身を除く): 6302023

約数列:

[1, 7, 23, 161, 307, 643, 2149, 4501, 7061, 14789, 49427, 103523, 197401, 1381807, 4540223, 31781561]

約数ペア:

[(1, 31781561), (7, 4540223), (23, 1381807), (161, 197401), (307, 103523), (643, 49427), (2149, 14789), (4501, 7061)]