21309715

素因数分解:

$5^1\times 7^1\times {\mathrm{89}}^1\times {\mathrm{6841}}^1$

素因数の和:6942

約数の個数: 16

約数和(自身を含む): 29557440

約数和(自身を除く): 8247725

約数列:

[1, 5, 7, 35, 89, 445, 623, 3115, 6841, 34205, 47887, 239435, 608849, 3044245, 4261943, 21309715]

約数ペア:

[(1, 21309715), (5, 4261943), (7, 3044245), (35, 608849), (89, 239435), (445, 47887), (623, 34205), (3115, 6841)]