1991980

素因数分解:

$2^2\times 5^1\times {\mathrm{137}}^1\times {\mathrm{727}}^1$

素因数の和:873

約数の個数: 24

約数和(自身を含む): 4219488

約数和(自身を除く): 2227508

約数列:

[1, 2, 4, 5, 10, 20, 137, 274, 548, 685, 727, 1370, 1454, 2740, 2908, 3635, 7270, 14540, 99599, 199198, 398396, 497995, 995990, 1991980]

約数ペア:

[(1, 1991980), (2, 995990), (4, 497995), (5, 398396), (10, 199198), (20, 99599), (137, 14540), (274, 7270), (548, 3635), (685, 2908), (727, 2740), (1370, 1454)]