19902010

素因数分解:

$2^1\times 5^1\times {\mathrm{71}}^1\times {\mathrm{28031}}^1$

素因数の和:28109

約数の個数: 16

約数和(自身を含む): 36329472

約数和(自身を除く): 16427462

約数列:

[1, 2, 5, 10, 71, 142, 355, 710, 28031, 56062, 140155, 280310, 1990201, 3980402, 9951005, 19902010]

約数ペア:

[(1, 19902010), (2, 9951005), (5, 3980402), (10, 1990201), (71, 280310), (142, 140155), (355, 56062), (710, 28031)]