21017180

素因数分解:

$2^2\times 5^1\times {\mathrm{397}}^1\times {\mathrm{2647}}^1$

素因数の和:3053

約数の個数: 24

約数和(自身を含む): 44263968

約数和(自身を除く): 23246788

約数列:

[1, 2, 4, 5, 10, 20, 397, 794, 1588, 1985, 2647, 3970, 5294, 7940, 10588, 13235, 26470, 52940, 1050859, 2101718, 4203436, 5254295, 10508590, 21017180]

約数ペア:

[(1, 21017180), (2, 10508590), (4, 5254295), (5, 4203436), (10, 2101718), (20, 1050859), (397, 52940), (794, 26470), (1588, 13235), (1985, 10588), (2647, 7940), (3970, 5294)]