78689680

素因数分解:

$2^4\times 5^1\times {\mathrm{197}}^1\times {\mathrm{4993}}^1$

素因数の和:5203

約数の個数: 40

約数和(自身を含む): 183919032

約数和(自身を除く): 105229352

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 197, 394, 788, 985, 1576, 1970, 3152, 3940, 4993, 7880, 9986, 15760, 19972, 24965, 39944, 49930, 79888, 99860, 199720, 399440, 983621, 1967242, 3934484, 4918105, 7868968, 9836210, 15737936, 19672420, 39344840, 78689680]

約数ペア:

[(1, 78689680), (2, 39344840), (4, 19672420), (5, 15737936), (8, 9836210), (10, 7868968), (16, 4918105), (20, 3934484), (40, 1967242), (80, 983621), (197, 399440), (394, 199720), (788, 99860), (985, 79888), (1576, 49930), (1970, 39944), (3152, 24965), (3940, 19972), (4993, 15760), (7880, 9986)]