21705142

素因数分解:

$2^1\times {\mathrm{61}}^1\times {\mathrm{89}}^1\times {\mathrm{1999}}^1$

素因数の和:2151

約数の個数: 16

約数和(自身を含む): 33480000

約数和(自身を除く): 11774858

約数列:

[1, 2, 61, 89, 122, 178, 1999, 3998, 5429, 10858, 121939, 177911, 243878, 355822, 10852571, 21705142]

約数ペア:

[(1, 21705142), (2, 10852571), (61, 355822), (89, 243878), (122, 177911), (178, 121939), (1999, 10858), (3998, 5429)]