21198560

素因数分解:

$2^5\times 5^1\times {\mathrm{132491}}^1$

素因数の和:132506

約数の個数: 24

約数和(自身を含む): 50081976

約数和(自身を除く): 28883416

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 132491, 264982, 529964, 662455, 1059928, 1324910, 2119856, 2649820, 4239712, 5299640, 10599280, 21198560]

約数ペア:

[(1, 21198560), (2, 10599280), (4, 5299640), (5, 4239712), (8, 2649820), (10, 2119856), (16, 1324910), (20, 1059928), (32, 662455), (40, 529964), (80, 264982), (160, 132491)]