18221680

素因数分解:

$2^4\times 5^1\times {\mathrm{43}}^1\times {\mathrm{5297}}^1$

素因数の和:5353

約数の個数: 40

約数和(自身を含む): 43358832

約数和(自身を除く): 25137152

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 43, 80, 86, 172, 215, 344, 430, 688, 860, 1720, 3440, 5297, 10594, 21188, 26485, 42376, 52970, 84752, 105940, 211880, 227771, 423760, 455542, 911084, 1138855, 1822168, 2277710, 3644336, 4555420, 9110840, 18221680]

約数ペア:

[(1, 18221680), (2, 9110840), (4, 4555420), (5, 3644336), (8, 2277710), (10, 1822168), (16, 1138855), (20, 911084), (40, 455542), (43, 423760), (80, 227771), (86, 211880), (172, 105940), (215, 84752), (344, 52970), (430, 42376), (688, 26485), (860, 21188), (1720, 10594), (3440, 5297)]