79720120

素因数分解:

$2^3\times 5^1\times {\mathrm{997}}^1\times {\mathrm{1999}}^1$

素因数の和:3007

約数の個数: 32

約数和(自身を含む): 179640000

約数和(自身を除く): 99919880

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 997, 1994, 1999, 3988, 3998, 4985, 7976, 7996, 9970, 9995, 15992, 19940, 19990, 39880, 39980, 79960, 1993003, 3986006, 7972012, 9965015, 15944024, 19930030, 39860060, 79720120]

約数ペア:

[(1, 79720120), (2, 39860060), (4, 19930030), (5, 15944024), (8, 9965015), (10, 7972012), (20, 3986006), (40, 1993003), (997, 79960), (1994, 39980), (1999, 39880), (3988, 19990), (3998, 19940), (4985, 15992), (7976, 9995), (7996, 9970)]