21449455

素因数分解:

$5^1\times {\mathrm{23}}^1\times {\mathrm{37}}^1\times {\mathrm{71}}^2$

素因数の和:207

約数の個数: 24

約数和(自身を含む): 27978336

約数和(自身を除く): 6528881

約数列:

[1, 5, 23, 37, 71, 115, 185, 355, 851, 1633, 2627, 4255, 5041, 8165, 13135, 25205, 60421, 115943, 186517, 302105, 579715, 932585, 4289891, 21449455]

約数ペア:

[(1, 21449455), (5, 4289891), (23, 932585), (37, 579715), (71, 302105), (115, 186517), (185, 115943), (355, 60421), (851, 25205), (1633, 13135), (2627, 8165), (4255, 5041)]