28001991

素因数分解:

$3^1\times {\mathrm{19}}^1\times {\mathrm{109}}^1\times {\mathrm{4507}}^1$

素因数の和:4638

約数の個数: 16

約数和(自身を含む): 39670400

約数和(自身を除く): 11668409

約数列:

[1, 3, 19, 57, 109, 327, 2071, 4507, 6213, 13521, 85633, 256899, 491263, 1473789, 9333997, 28001991]

約数ペア:

[(1, 28001991), (3, 9333997), (19, 1473789), (57, 491263), (109, 256899), (327, 85633), (2071, 13521), (4507, 6213)]