19979080

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{2671}}^1$

素因数の和:2710

約数の個数: 64

約数和(自身を含む): 51943680

約数和(自身を除く): 31964600

約数列:

[1, 2, 4, 5, 8, 10, 11, 17, 20, 22, 34, 40, 44, 55, 68, 85, 88, 110, 136, 170, 187, 220, 340, 374, 440, 680, 748, 935, 1496, 1870, 2671, 3740, 5342, 7480, 10684, 13355, 21368, 26710, 29381, 45407, 53420, 58762, 90814, 106840, 117524, 146905, 181628, 227035, 235048, 293810, 363256, 454070, 499477, 587620, 908140, 998954, 1175240, 1816280, 1997908, 2497385, 3995816, 4994770, 9989540, 19979080]

約数ペア:

[(1, 19979080), (2, 9989540), (4, 4994770), (5, 3995816), (8, 2497385), (10, 1997908), (11, 1816280), (17, 1175240), (20, 998954), (22, 908140), (34, 587620), (40, 499477), (44, 454070), (55, 363256), (68, 293810), (85, 235048), (88, 227035), (110, 181628), (136, 146905), (170, 117524), (187, 106840), (220, 90814), (340, 58762), (374, 53420), (440, 45407), (680, 29381), (748, 26710), (935, 21368), (1496, 13355), (1870, 10684), (2671, 7480), (3740, 5342)]