21502563

素因数分解:

$3^1\times {\mathrm{71}}^1\times {\mathrm{157}}^1\times {\mathrm{643}}^1$

素因数の和:874

約数の個数: 16

約数和(自身を含む): 29304576

約数和(自身を除く): 7802013

約数列:

[1, 3, 71, 157, 213, 471, 643, 1929, 11147, 33441, 45653, 100951, 136959, 302853, 7167521, 21502563]

約数ペア:

[(1, 21502563), (3, 7167521), (71, 302853), (157, 136959), (213, 100951), (471, 45653), (643, 33441), (1929, 11147)]