12700219960

素因数分解:

$2^3\times 5^1\times {\mathrm{991}}^1\times {\mathrm{320389}}^1$

素因数の和:321391

約数の個数: 32

約数和(自身を含む): 28604419200

約数和(自身を除く): 15904199240

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 991, 1982, 3964, 4955, 7928, 9910, 19820, 39640, 320389, 640778, 1281556, 1601945, 2563112, 3203890, 6407780, 12815560, 317505499, 635010998, 1270021996, 1587527495, 2540043992, 3175054990, 6350109980, 12700219960]

約数ペア:

[(1, 12700219960), (2, 6350109980), (4, 3175054990), (5, 2540043992), (8, 1587527495), (10, 1270021996), (20, 635010998), (40, 317505499), (991, 12815560), (1982, 6407780), (3964, 3203890), (4955, 2563112), (7928, 1601945), (9910, 1281556), (19820, 640778), (39640, 320389)]