257100040

素因数分解:

$2^3\times 5^1\times {\mathrm{199}}^1\times {\mathrm{32299}}^1$

素因数の和:32509

約数の個数: 32

約数和(自身を含む): 581400000

約数和(自身を除く): 324299960

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 199, 398, 796, 995, 1592, 1990, 3980, 7960, 32299, 64598, 129196, 161495, 258392, 322990, 645980, 1291960, 6427501, 12855002, 25710004, 32137505, 51420008, 64275010, 128550020, 257100040]

約数ペア:

[(1, 257100040), (2, 128550020), (4, 64275010), (5, 51420008), (8, 32137505), (10, 25710004), (20, 12855002), (40, 6427501), (199, 1291960), (398, 645980), (796, 322990), (995, 258392), (1592, 161495), (1990, 129196), (3980, 64598), (7960, 32299)]