17979820

素因数分解:

$2^2\times 5^1\times {\mathrm{691}}^1\times {\mathrm{1301}}^1$

素因数の和:2001

約数の個数: 24

約数和(自身を含む): 37841328

約数和(自身を除く): 19861508

約数列:

[1, 2, 4, 5, 10, 20, 691, 1301, 1382, 2602, 2764, 3455, 5204, 6505, 6910, 13010, 13820, 26020, 898991, 1797982, 3595964, 4494955, 8989910, 17979820]

約数ペア:

[(1, 17979820), (2, 8989910), (4, 4494955), (5, 3595964), (10, 1797982), (20, 898991), (691, 26020), (1301, 13820), (1382, 13010), (2602, 6910), (2764, 6505), (3455, 5204)]