21497231

素因数分解:

$7^2\times {\mathrm{17}}^1\times {\mathrm{131}}^1\times {\mathrm{197}}^1$

素因数の和:359

約数の個数: 24

約数和(自身を含む): 26815536

約数和(自身を除く): 5318305

約数列:

[1, 7, 17, 49, 119, 131, 197, 833, 917, 1379, 2227, 3349, 6419, 9653, 15589, 23443, 25807, 109123, 164101, 180649, 438719, 1264543, 3071033, 21497231]

約数ペア:

[(1, 21497231), (7, 3071033), (17, 1264543), (49, 438719), (119, 180649), (131, 164101), (197, 109123), (833, 25807), (917, 23443), (1379, 15589), (2227, 9653), (3349, 6419)]