313639720

素因数分解:

$2^3\times 5^1\times {\mathrm{647}}^1\times {\mathrm{12119}}^1$

素因数の和:12777

約数の個数: 32

約数和(自身を含む): 706838400

約数和(自身を除く): 393198680

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 647, 1294, 2588, 3235, 5176, 6470, 12119, 12940, 24238, 25880, 48476, 60595, 96952, 121190, 242380, 484760, 7840993, 15681986, 31363972, 39204965, 62727944, 78409930, 156819860, 313639720]

約数ペア:

[(1, 313639720), (2, 156819860), (4, 78409930), (5, 62727944), (8, 39204965), (10, 31363972), (20, 15681986), (40, 7840993), (647, 484760), (1294, 242380), (2588, 121190), (3235, 96952), (5176, 60595), (6470, 48476), (12119, 25880), (12940, 24238)]