21724137

素因数分解:

$3^2\times {\mathrm{41}}^1\times {\mathrm{113}}^1\times {\mathrm{521}}^1$

素因数の和:681

約数の個数: 24

約数和(自身を含む): 32491368

約数和(自身を除く): 10767231

約数列:

[1, 3, 9, 41, 113, 123, 339, 369, 521, 1017, 1563, 4633, 4689, 13899, 21361, 41697, 58873, 64083, 176619, 192249, 529857, 2413793, 7241379, 21724137]

約数ペア:

[(1, 21724137), (3, 7241379), (9, 2413793), (41, 529857), (113, 192249), (123, 176619), (339, 64083), (369, 58873), (521, 41697), (1017, 21361), (1563, 13899), (4633, 4689)]