18990220

素因数分解:

$2^2\times 5^1\times {\mathrm{73}}^1\times {\mathrm{13007}}^1$

素因数の和:13089

約数の個数: 24

約数和(自身を含む): 40428864

約数和(自身を除く): 21438644

約数列:

[1, 2, 4, 5, 10, 20, 73, 146, 292, 365, 730, 1460, 13007, 26014, 52028, 65035, 130070, 260140, 949511, 1899022, 3798044, 4747555, 9495110, 18990220]

約数ペア:

[(1, 18990220), (2, 9495110), (4, 4747555), (5, 3798044), (10, 1899022), (20, 949511), (73, 260140), (146, 130070), (292, 65035), (365, 52028), (730, 26014), (1460, 13007)]