19911520

素因数分解:

$2^5\times 5^1\times {\mathrm{124447}}^1$

素因数の和:124462

約数の個数: 24

約数和(自身を含む): 47041344

約数和(自身を除く): 27129824

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 124447, 248894, 497788, 622235, 995576, 1244470, 1991152, 2488940, 3982304, 4977880, 9955760, 19911520]

約数ペア:

[(1, 19911520), (2, 9955760), (4, 4977880), (5, 3982304), (8, 2488940), (10, 1991152), (16, 1244470), (20, 995576), (32, 622235), (40, 497788), (80, 248894), (160, 124447)]