419734780

素因数分解:

$2^2\times 5^1\times {\mathrm{163}}^1\times {\mathrm{199}}^1\times {\mathrm{647}}^1$

素因数の和:1018

約数の個数: 48

約数和(自身を含む): 892684800

約数和(自身を除く): 472950020

約数列:

[1, 2, 4, 5, 10, 20, 163, 199, 326, 398, 647, 652, 796, 815, 995, 1294, 1630, 1990, 2588, 3235, 3260, 3980, 6470, 12940, 32437, 64874, 105461, 128753, 129748, 162185, 210922, 257506, 324370, 421844, 515012, 527305, 643765, 648740, 1054610, 1287530, 2109220, 2575060, 20986739, 41973478, 83946956, 104933695, 209867390, 419734780]

約数ペア:

[(1, 419734780), (2, 209867390), (4, 104933695), (5, 83946956), (10, 41973478), (20, 20986739), (163, 2575060), (199, 2109220), (326, 1287530), (398, 1054610), (647, 648740), (652, 643765), (796, 527305), (815, 515012), (995, 421844), (1294, 324370), (1630, 257506), (1990, 210922), (2588, 162185), (3235, 129748), (3260, 128753), (3980, 105461), (6470, 64874), (12940, 32437)]