21355990

素因数分解:

$2^1\times 5^1\times {\mathrm{313}}^1\times {\mathrm{6823}}^1$

素因数の和:7143

約数の個数: 16

約数和(自身を含む): 38569248

約数和(自身を除く): 17213258

約数列:

[1, 2, 5, 10, 313, 626, 1565, 3130, 6823, 13646, 34115, 68230, 2135599, 4271198, 10677995, 21355990]

約数ペア:

[(1, 21355990), (2, 10677995), (5, 4271198), (10, 2135599), (313, 68230), (626, 34115), (1565, 13646), (3130, 6823)]