18579280

素因数分解:

$2^4\times 5^1\times {\mathrm{71}}^1\times {\mathrm{3271}}^1$

素因数の和:3355

約数の個数: 40

約数和(自身を含む): 43818624

約数和(自身を除く): 25239344

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 71, 80, 142, 284, 355, 568, 710, 1136, 1420, 2840, 3271, 5680, 6542, 13084, 16355, 26168, 32710, 52336, 65420, 130840, 232241, 261680, 464482, 928964, 1161205, 1857928, 2322410, 3715856, 4644820, 9289640, 18579280]

約数ペア:

[(1, 18579280), (2, 9289640), (4, 4644820), (5, 3715856), (8, 2322410), (10, 1857928), (16, 1161205), (20, 928964), (40, 464482), (71, 261680), (80, 232241), (142, 130840), (284, 65420), (355, 52336), (568, 32710), (710, 26168), (1136, 16355), (1420, 13084), (2840, 6542), (3271, 5680)]