19787815

素因数分解:

$5^1\times {\mathrm{53}}^1\times {\mathrm{89}}^1\times {\mathrm{839}}^1$

素因数の和:986

約数の個数: 16

約数和(自身を含む): 24494400

約数和(自身を除く): 4706585

約数列:

[1, 5, 53, 89, 265, 445, 839, 4195, 4717, 23585, 44467, 74671, 222335, 373355, 3957563, 19787815]

約数ペア:

[(1, 19787815), (5, 3957563), (53, 373355), (89, 222335), (265, 74671), (445, 44467), (839, 23585), (4195, 4717)]