20307760

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{47}}^1\times {\mathrm{491}}^1$

素因数の和:562

約数の個数: 80

約数和(自身を含む): 52710912

約数和(自身を除く): 32403152

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, 470, 491, 517, 752, 880, 940, 982, 1034, 1880, 1964, 2068, 2455, 2585, 3760, 3928, 4136, 4910, 5170, 5401, 7856, 8272, 9820, 10340, 10802, 19640, 20680, 21604, 23077, 27005, 39280, 41360, 43208, 46154, 54010, 86416, 92308, 108020, 115385, 184616, 216040, 230770, 253847, 369232, 432080, 461540, 507694, 923080, 1015388, 1269235, 1846160, 2030776, 2538470, 4061552, 5076940, 10153880, 20307760]

約数ペア:

[(1, 20307760), (2, 10153880), (4, 5076940), (5, 4061552), (8, 2538470), (10, 2030776), (11, 1846160), (16, 1269235), (20, 1015388), (22, 923080), (40, 507694), (44, 461540), (47, 432080), (55, 369232), (80, 253847), (88, 230770), (94, 216040), (110, 184616), (176, 115385), (188, 108020), (220, 92308), (235, 86416), (376, 54010), (440, 46154), (470, 43208), (491, 41360), (517, 39280), (752, 27005), (880, 23077), (940, 21604), (982, 20680), (1034, 19640), (1880, 10802), (1964, 10340), (2068, 9820), (2455, 8272), (2585, 7856), (3760, 5401), (3928, 5170), (4136, 4910)]