20161504

素因数分解:

$2^5\times {\mathrm{11}}^2\times {\mathrm{41}}^1\times {\mathrm{127}}^1$

素因数の和:200

約数の個数: 72

約数和(自身を含む): 45045504

約数和(自身を除く): 24884000

約数列:

[1, 2, 4, 8, 11, 16, 22, 32, 41, 44, 82, 88, 121, 127, 164, 176, 242, 254, 328, 352, 451, 484, 508, 656, 902, 968, 1016, 1312, 1397, 1804, 1936, 2032, 2794, 3608, 3872, 4064, 4961, 5207, 5588, 7216, 9922, 10414, 11176, 14432, 15367, 19844, 20828, 22352, 30734, 39688, 41656, 44704, 57277, 61468, 79376, 83312, 114554, 122936, 158752, 166624, 229108, 245872, 458216, 491744, 630047, 916432, 1260094, 1832864, 2520188, 5040376, 10080752, 20161504]

約数ペア:

[(1, 20161504), (2, 10080752), (4, 5040376), (8, 2520188), (11, 1832864), (16, 1260094), (22, 916432), (32, 630047), (41, 491744), (44, 458216), (82, 245872), (88, 229108), (121, 166624), (127, 158752), (164, 122936), (176, 114554), (242, 83312), (254, 79376), (328, 61468), (352, 57277), (451, 44704), (484, 41656), (508, 39688), (656, 30734), (902, 22352), (968, 20828), (1016, 19844), (1312, 15367), (1397, 14432), (1804, 11176), (1936, 10414), (2032, 9922), (2794, 7216), (3608, 5588), (3872, 5207), (4064, 4961)]