12781360

素因数分解:

$2^4\times 5^1\times {\mathrm{197}}^1\times {\mathrm{811}}^1$

素因数の和:1021

約数の個数: 40

約数和(自身を含む): 29904336

約数和(自身を除く): 17122976

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 197, 394, 788, 811, 985, 1576, 1622, 1970, 3152, 3244, 3940, 4055, 6488, 7880, 8110, 12976, 15760, 16220, 32440, 64880, 159767, 319534, 639068, 798835, 1278136, 1597670, 2556272, 3195340, 6390680, 12781360]

約数ペア:

[(1, 12781360), (2, 6390680), (4, 3195340), (5, 2556272), (8, 1597670), (10, 1278136), (16, 798835), (20, 639068), (40, 319534), (80, 159767), (197, 64880), (394, 32440), (788, 16220), (811, 15760), (985, 12976), (1576, 8110), (1622, 7880), (1970, 6488), (3152, 4055), (3244, 3940)]