128042120

素因数分解:

$2^3\times 5^1\times {\mathrm{197}}^1\times {\mathrm{16249}}^1$

素因数の和:16457

約数の個数: 32

約数和(自身を含む): 289575000

約数和(自身を除く): 161532880

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 197, 394, 788, 985, 1576, 1970, 3940, 7880, 16249, 32498, 64996, 81245, 129992, 162490, 324980, 649960, 3201053, 6402106, 12804212, 16005265, 25608424, 32010530, 64021060, 128042120]

約数ペア:

[(1, 128042120), (2, 64021060), (4, 32010530), (5, 25608424), (8, 16005265), (10, 12804212), (20, 6402106), (40, 3201053), (197, 649960), (394, 324980), (788, 162490), (985, 129992), (1576, 81245), (1970, 64996), (3940, 32498), (7880, 16249)]