21108190

素因数分解:

$2^1\times 5^1\times {\mathrm{271}}^1\times {\mathrm{7789}}^1$

素因数の和:8067

約数の個数: 16

約数和(自身を含む): 38139840

約数和(自身を除く): 17031650

約数列:

[1, 2, 5, 10, 271, 542, 1355, 2710, 7789, 15578, 38945, 77890, 2110819, 4221638, 10554095, 21108190]

約数ペア:

[(1, 21108190), (2, 10554095), (5, 4221638), (10, 2110819), (271, 77890), (542, 38945), (1355, 15578), (2710, 7789)]