19902520

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{45233}}^1$

素因数の和:45255

約数の個数: 32

約数和(自身を含む): 48852720

約数和(自身を除く): 28950200

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 220, 440, 45233, 90466, 180932, 226165, 361864, 452330, 497563, 904660, 995126, 1809320, 1990252, 2487815, 3980504, 4975630, 9951260, 19902520]

約数ペア:

[(1, 19902520), (2, 9951260), (4, 4975630), (5, 3980504), (8, 2487815), (10, 1990252), (11, 1809320), (20, 995126), (22, 904660), (40, 497563), (44, 452330), (55, 361864), (88, 226165), (110, 180932), (220, 90466), (440, 45233)]