639761740

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{367}}^1\times {\mathrm{2027}}^1$

素因数の和:2446

約数の個数: 48

約数和(自身を含む): 1379169792

約数和(自身を除く): 739408052

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 172, 215, 367, 430, 734, 860, 1468, 1835, 2027, 3670, 4054, 7340, 8108, 10135, 15781, 20270, 31562, 40540, 63124, 78905, 87161, 157810, 174322, 315620, 348644, 435805, 743909, 871610, 1487818, 1743220, 2975636, 3719545, 7439090, 14878180, 31988087, 63976174, 127952348, 159940435, 319880870, 639761740]

約数ペア:

[(1, 639761740), (2, 319880870), (4, 159940435), (5, 127952348), (10, 63976174), (20, 31988087), (43, 14878180), (86, 7439090), (172, 3719545), (215, 2975636), (367, 1743220), (430, 1487818), (734, 871610), (860, 743909), (1468, 435805), (1835, 348644), (2027, 315620), (3670, 174322), (4054, 157810), (7340, 87161), (8108, 78905), (10135, 63124), (15781, 40540), (20270, 31562)]