21440315

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{19403}}^1$

素因数の和:19438

約数の個数: 16

約数和(自身を含む): 29338848

約数和(自身を除く): 7898533

約数列:

[1, 5, 13, 17, 65, 85, 221, 1105, 19403, 97015, 252239, 329851, 1261195, 1649255, 4288063, 21440315]

約数ペア:

[(1, 21440315), (5, 4288063), (13, 1649255), (17, 1261195), (65, 329851), (85, 252239), (221, 97015), (1105, 19403)]