21528409

素因数分解:

$7^1\times {\mathrm{17}}^1\times {\mathrm{131}}^1\times {\mathrm{1381}}^1$

素因数の和:1536

約数の個数: 16

約数和(自身を含む): 26269056

約数和(自身を除く): 4740647

約数列:

[1, 7, 17, 119, 131, 917, 1381, 2227, 9667, 15589, 23477, 164339, 180911, 1266377, 3075487, 21528409]

約数ペア:

[(1, 21528409), (7, 3075487), (17, 1266377), (119, 180911), (131, 164339), (917, 23477), (1381, 15589), (2227, 9667)]