79240360

素因数分解:

$2^3\times 5^1\times {\mathrm{991}}^1\times {\mathrm{1999}}^1$

素因数の和:3001

約数の個数: 32

約数和(自身を含む): 178560000

約数和(自身を除く): 99319640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 991, 1982, 1999, 3964, 3998, 4955, 7928, 7996, 9910, 9995, 15992, 19820, 19990, 39640, 39980, 79960, 1981009, 3962018, 7924036, 9905045, 15848072, 19810090, 39620180, 79240360]

約数ペア:

[(1, 79240360), (2, 39620180), (4, 19810090), (5, 15848072), (8, 9905045), (10, 7924036), (20, 3962018), (40, 1981009), (991, 79960), (1982, 39980), (1999, 39640), (3964, 19990), (3998, 19820), (4955, 15992), (7928, 9995), (7996, 9910)]