21120010

素因数分解:

$2^1\times 5^1\times {\mathrm{311}}^1\times {\mathrm{6791}}^1$

素因数の和:7109

約数の個数: 16

約数和(自身を含む): 38143872

約数和(自身を除く): 17023862

約数列:

[1, 2, 5, 10, 311, 622, 1555, 3110, 6791, 13582, 33955, 67910, 2112001, 4224002, 10560005, 21120010]

約数ペア:

[(1, 21120010), (2, 10560005), (5, 4224002), (10, 2112001), (311, 67910), (622, 33955), (1555, 13582), (3110, 6791)]