639156956

素因数分解:

$2^2\times {\mathrm{17}}^1\times {\mathrm{149}}^1\times {\mathrm{199}}^1\times {\mathrm{317}}^1$

素因数の和:686

約数の個数: 48

約数和(自身を含む): 1202040000

約数和(自身を除く): 562883044

約数列:

[1, 2, 4, 17, 34, 68, 149, 199, 298, 317, 398, 596, 634, 796, 1268, 2533, 3383, 5066, 5389, 6766, 10132, 10778, 13532, 21556, 29651, 47233, 59302, 63083, 94466, 118604, 126166, 188932, 252332, 504067, 802961, 1008134, 1072411, 1605922, 2016268, 2144822, 3211844, 4289644, 9399367, 18798734, 37597468, 159789239, 319578478, 639156956]

約数ペア:

[(1, 639156956), (2, 319578478), (4, 159789239), (17, 37597468), (34, 18798734), (68, 9399367), (149, 4289644), (199, 3211844), (298, 2144822), (317, 2016268), (398, 1605922), (596, 1072411), (634, 1008134), (796, 802961), (1268, 504067), (2533, 252332), (3383, 188932), (5066, 126166), (5389, 118604), (6766, 94466), (10132, 63083), (10778, 59302), (13532, 47233), (21556, 29651)]