20709040

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{101}}^1\times {\mathrm{233}}^1$

素因数の和:358

約数の個数: 80

約数和(自身を含む): 53273376

約数和(自身を除く): 32564336

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 55, 80, 88, 101, 110, 176, 202, 220, 233, 404, 440, 466, 505, 808, 880, 932, 1010, 1111, 1165, 1616, 1864, 2020, 2222, 2330, 2563, 3728, 4040, 4444, 4660, 5126, 5555, 8080, 8888, 9320, 10252, 11110, 12815, 17776, 18640, 20504, 22220, 23533, 25630, 41008, 44440, 47066, 51260, 88880, 94132, 102520, 117665, 188264, 205040, 235330, 258863, 376528, 470660, 517726, 941320, 1035452, 1294315, 1882640, 2070904, 2588630, 4141808, 5177260, 10354520, 20709040]

約数ペア:

[(1, 20709040), (2, 10354520), (4, 5177260), (5, 4141808), (8, 2588630), (10, 2070904), (11, 1882640), (16, 1294315), (20, 1035452), (22, 941320), (40, 517726), (44, 470660), (55, 376528), (80, 258863), (88, 235330), (101, 205040), (110, 188264), (176, 117665), (202, 102520), (220, 94132), (233, 88880), (404, 51260), (440, 47066), (466, 44440), (505, 41008), (808, 25630), (880, 23533), (932, 22220), (1010, 20504), (1111, 18640), (1165, 17776), (1616, 12815), (1864, 11110), (2020, 10252), (2222, 9320), (2330, 8888), (2563, 8080), (3728, 5555), (4040, 5126), (4444, 4660)]