21890090

素因数分解:

$2^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{115211}}^1$

素因数の和:115237

約数の個数: 16

約数和(自身を含む): 41476320

約数和(自身を除く): 19586230

約数列:

[1, 2, 5, 10, 19, 38, 95, 190, 115211, 230422, 576055, 1152110, 2189009, 4378018, 10945045, 21890090]

約数ペア:

[(1, 21890090), (2, 10945045), (5, 4378018), (10, 2189009), (19, 1152110), (38, 576055), (95, 230422), (190, 115211)]