18043280

素因数分解:

$2^4\times 5^1\times {\mathrm{41}}^1\times {\mathrm{5501}}^1$

素因数の和:5555

約数の個数: 40

約数和(自身を含む): 42981624

約数和(自身を除く): 24938344

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 41, 80, 82, 164, 205, 328, 410, 656, 820, 1640, 3280, 5501, 11002, 22004, 27505, 44008, 55010, 88016, 110020, 220040, 225541, 440080, 451082, 902164, 1127705, 1804328, 2255410, 3608656, 4510820, 9021640, 18043280]

約数ペア:

[(1, 18043280), (2, 9021640), (4, 4510820), (5, 3608656), (8, 2255410), (10, 1804328), (16, 1127705), (20, 902164), (40, 451082), (41, 440080), (80, 225541), (82, 220040), (164, 110020), (205, 88016), (328, 55010), (410, 44008), (656, 27505), (820, 22004), (1640, 11002), (3280, 5501)]