18901520

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{47}}^1\times {\mathrm{457}}^1$

素因数の和:528

約数の個数: 80

約数和(自身を含む): 49068288

約数和(自身を除く): 30166768

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 47, 55, 80, 88, 94, 110, 176, 188, 220, 235, 376, 440, 457, 470, 517, 752, 880, 914, 940, 1034, 1828, 1880, 2068, 2285, 2585, 3656, 3760, 4136, 4570, 5027, 5170, 7312, 8272, 9140, 10054, 10340, 18280, 20108, 20680, 21479, 25135, 36560, 40216, 41360, 42958, 50270, 80432, 85916, 100540, 107395, 171832, 201080, 214790, 236269, 343664, 402160, 429580, 472538, 859160, 945076, 1181345, 1718320, 1890152, 2362690, 3780304, 4725380, 9450760, 18901520]

約数ペア:

[(1, 18901520), (2, 9450760), (4, 4725380), (5, 3780304), (8, 2362690), (10, 1890152), (11, 1718320), (16, 1181345), (20, 945076), (22, 859160), (40, 472538), (44, 429580), (47, 402160), (55, 343664), (80, 236269), (88, 214790), (94, 201080), (110, 171832), (176, 107395), (188, 100540), (220, 85916), (235, 80432), (376, 50270), (440, 42958), (457, 41360), (470, 40216), (517, 36560), (752, 25135), (880, 21479), (914, 20680), (940, 20108), (1034, 18280), (1828, 10340), (1880, 10054), (2068, 9140), (2285, 8272), (2585, 7312), (3656, 5170), (3760, 5027), (4136, 4570)]