31791280

素因数分解:

$2^4\times 5^1\times {\mathrm{401}}^1\times {\mathrm{991}}^1$

素因数の和:1405

約数の個数: 40

約数和(自身を含む): 74173824

約数和(自身を除く): 42382544

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 401, 802, 991, 1604, 1982, 2005, 3208, 3964, 4010, 4955, 6416, 7928, 8020, 9910, 15856, 16040, 19820, 32080, 39640, 79280, 397391, 794782, 1589564, 1986955, 3179128, 3973910, 6358256, 7947820, 15895640, 31791280]

約数ペア:

[(1, 31791280), (2, 15895640), (4, 7947820), (5, 6358256), (8, 3973910), (10, 3179128), (16, 1986955), (20, 1589564), (40, 794782), (80, 397391), (401, 79280), (802, 39640), (991, 32080), (1604, 19820), (1982, 16040), (2005, 15856), (3208, 9910), (3964, 8020), (4010, 7928), (4955, 6416)]