20080280

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{47}}^1\times {\mathrm{971}}^1$

素因数の和:1040

約数の個数: 64

約数和(自身を含む): 50388480

約数和(自身を除く): 30308200

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 47, 55, 88, 94, 110, 188, 220, 235, 376, 440, 470, 517, 940, 971, 1034, 1880, 1942, 2068, 2585, 3884, 4136, 4855, 5170, 7768, 9710, 10340, 10681, 19420, 20680, 21362, 38840, 42724, 45637, 53405, 85448, 91274, 106810, 182548, 213620, 228185, 365096, 427240, 456370, 502007, 912740, 1004014, 1825480, 2008028, 2510035, 4016056, 5020070, 10040140, 20080280]

約数ペア:

[(1, 20080280), (2, 10040140), (4, 5020070), (5, 4016056), (8, 2510035), (10, 2008028), (11, 1825480), (20, 1004014), (22, 912740), (40, 502007), (44, 456370), (47, 427240), (55, 365096), (88, 228185), (94, 213620), (110, 182548), (188, 106810), (220, 91274), (235, 85448), (376, 53405), (440, 45637), (470, 42724), (517, 38840), (940, 21362), (971, 20680), (1034, 19420), (1880, 10681), (1942, 10340), (2068, 9710), (2585, 7768), (3884, 5170), (4136, 4855)]