257439080

素因数分解:

$2^3\times 5^1\times {\mathrm{1289}}^1\times {\mathrm{4993}}^1$

素因数の和:6293

約数の個数: 32

約数和(自身を含む): 579803400

約数和(自身を除く): 322364320

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 1289, 2578, 4993, 5156, 6445, 9986, 10312, 12890, 19972, 24965, 25780, 39944, 49930, 51560, 99860, 199720, 6435977, 12871954, 25743908, 32179885, 51487816, 64359770, 128719540, 257439080]

約数ペア:

[(1, 257439080), (2, 128719540), (4, 64359770), (5, 51487816), (8, 32179885), (10, 25743908), (20, 12871954), (40, 6435977), (1289, 199720), (2578, 99860), (4993, 51560), (5156, 49930), (6445, 39944), (9986, 25780), (10312, 24965), (12890, 19972)]