19915880

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{11579}}^1$

素因数の和:11633

約数の個数: 32

約数和(自身を含む): 45856800

約数和(自身を除く): 25940920

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 172, 215, 344, 430, 860, 1720, 11579, 23158, 46316, 57895, 92632, 115790, 231580, 463160, 497897, 995794, 1991588, 2489485, 3983176, 4978970, 9957940, 19915880]

約数ペア:

[(1, 19915880), (2, 9957940), (4, 4978970), (5, 3983176), (8, 2489485), (10, 1991588), (20, 995794), (40, 497897), (43, 463160), (86, 231580), (172, 115790), (215, 92632), (344, 57895), (430, 46316), (860, 23158), (1720, 11579)]