18985520

素因数分解:

$2^4\times 5^1\times {\mathrm{237319}}^1$

素因数の和:237332

約数の個数: 20

約数和(自身を含む): 44141520

約数和(自身を除く): 25156000

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 237319, 474638, 949276, 1186595, 1898552, 2373190, 3797104, 4746380, 9492760, 18985520]

約数ペア:

[(1, 18985520), (2, 9492760), (4, 4746380), (5, 3797104), (8, 2373190), (10, 1898552), (16, 1186595), (20, 949276), (40, 474638), (80, 237319)]