20708990

素因数分解:

$2^1\times 5^1\times {\mathrm{421}}^1\times {\mathrm{4919}}^1$

素因数の和:5347

約数の個数: 16

約数和(自身を含む): 37372320

約数和(自身を除く): 16663330

約数列:

[1, 2, 5, 10, 421, 842, 2105, 4210, 4919, 9838, 24595, 49190, 2070899, 4141798, 10354495, 20708990]

約数ペア:

[(1, 20708990), (2, 10354495), (5, 4141798), (10, 2070899), (421, 49190), (842, 24595), (2105, 9838), (4210, 4919)]