21067257

素因数分解:

$3^1\times {\mathrm{19}}^1\times {\mathrm{139}}^1\times {\mathrm{2659}}^1$

素因数の和:2820

約数の個数: 16

約数和(自身を含む): 29792000

約数和(自身を除く): 8724743

約数列:

[1, 3, 19, 57, 139, 417, 2641, 2659, 7923, 7977, 50521, 151563, 369601, 1108803, 7022419, 21067257]

約数ペア:

[(1, 21067257), (3, 7022419), (19, 1108803), (57, 369601), (139, 151563), (417, 50521), (2641, 7977), (2659, 7923)]