21712439

素因数分解:

$7^2\times {\mathrm{71}}^1\times {\mathrm{79}}^2$

素因数の和:243

約数の個数: 18

約数和(自身を含む): 25941384

約数和(自身を除く): 4228945

約数列:

[1, 7, 49, 71, 79, 497, 553, 3479, 3871, 5609, 6241, 39263, 43687, 274841, 305809, 443111, 3101777, 21712439]

約数ペア:

[(1, 21712439), (7, 3101777), (49, 443111), (71, 305809), (79, 274841), (497, 43687), (553, 39263), (3479, 6241), (3871, 5609)]