18435980

素因数分解:

$2^2\times 5^1\times {\mathrm{509}}^1\times {\mathrm{1811}}^1$

素因数の和:2329

約数の個数: 24

約数和(自身を含む): 38813040

約数和(自身を除く): 20377060

約数列:

[1, 2, 4, 5, 10, 20, 509, 1018, 1811, 2036, 2545, 3622, 5090, 7244, 9055, 10180, 18110, 36220, 921799, 1843598, 3687196, 4608995, 9217990, 18435980]

約数ペア:

[(1, 18435980), (2, 9217990), (4, 4608995), (5, 3687196), (10, 1843598), (20, 921799), (509, 36220), (1018, 18110), (1811, 10180), (2036, 9055), (2545, 7244), (3622, 5090)]