21881561

素因数分解:

${\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{151}}^1\times {\mathrm{157}}^1$

素因数の和:392

約数の個数: 16

約数和(自身を含む): 24208128

約数和(自身を除く): 2326567

約数列:

[1, 13, 71, 151, 157, 923, 1963, 2041, 10721, 11147, 23707, 139373, 144911, 308191, 1683197, 21881561]

約数ペア:

[(1, 21881561), (13, 1683197), (71, 308191), (151, 144911), (157, 139373), (923, 23707), (1963, 11147), (2041, 10721)]