21958120

素因数分解:

$2^3\times 5^1\times {\mathrm{548953}}^1$

素因数の和:548964

約数の個数: 16

約数和(自身を含む): 49405860

約数和(自身を除く): 27447740

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 548953, 1097906, 2195812, 2744765, 4391624, 5489530, 10979060, 21958120]

約数ペア:

[(1, 21958120), (2, 10979060), (4, 5489530), (5, 4391624), (8, 2744765), (10, 2195812), (20, 1097906), (40, 548953)]