21807531

素因数分解:

$3^2\times {\mathrm{41}}^1\times {\mathrm{113}}^1\times {\mathrm{523}}^1$

素因数の和:683

約数の個数: 24

約数和(自身を含む): 32615856

約数和(自身を除く): 10808325

約数列:

[1, 3, 9, 41, 113, 123, 339, 369, 523, 1017, 1569, 4633, 4707, 13899, 21443, 41697, 59099, 64329, 177297, 192987, 531891, 2423059, 7269177, 21807531]

約数ペア:

[(1, 21807531), (3, 7269177), (9, 2423059), (41, 531891), (113, 192987), (123, 177297), (339, 64329), (369, 59099), (523, 41697), (1017, 21443), (1569, 13899), (4633, 4707)]