21171409

素因数分解:

$7^1\times {\mathrm{17}}^1\times {\mathrm{89}}^1\times {\mathrm{1999}}^1$

素因数の和:2112

約数の個数: 16

約数和(自身を含む): 25920000

約数和(自身を除く): 4748591

約数列:

[1, 7, 17, 89, 119, 623, 1513, 1999, 10591, 13993, 33983, 177911, 237881, 1245377, 3024487, 21171409]

約数ペア:

[(1, 21171409), (7, 3024487), (17, 1245377), (89, 237881), (119, 177911), (623, 33983), (1513, 13993), (1999, 10591)]