20161225180

素因数分解:

$2^2\times 5^1\times {\mathrm{89}}^1\times {\mathrm{313}}^1\times {\mathrm{36187}}^1$

素因数の和:36598

約数の個数: 48

約数和(自身を含む): 42952260960

約数和(自身を除く): 22791035780

約数列:

[1, 2, 4, 5, 10, 20, 89, 178, 313, 356, 445, 626, 890, 1252, 1565, 1780, 3130, 6260, 27857, 36187, 55714, 72374, 111428, 139285, 144748, 180935, 278570, 361870, 557140, 723740, 3220643, 6441286, 11326531, 12882572, 16103215, 22653062, 32206430, 45306124, 56632655, 64412860, 113265310, 226530620, 1008061259, 2016122518, 4032245036, 5040306295, 10080612590, 20161225180]

約数ペア:

[(1, 20161225180), (2, 10080612590), (4, 5040306295), (5, 4032245036), (10, 2016122518), (20, 1008061259), (89, 226530620), (178, 113265310), (313, 64412860), (356, 56632655), (445, 45306124), (626, 32206430), (890, 22653062), (1252, 16103215), (1565, 12882572), (1780, 11326531), (3130, 6441286), (6260, 3220643), (27857, 723740), (36187, 557140), (55714, 361870), (72374, 278570), (111428, 180935), (139285, 144748)]