21919947

素因数分解:

$3^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{28211}}^1$

素因数の和:28258

約数の個数: 16

約数和(自身を含む): 34305792

約数和(自身を除く): 12385845

約数列:

[1, 3, 7, 21, 37, 111, 259, 777, 28211, 84633, 197477, 592431, 1043807, 3131421, 7306649, 21919947]

約数ペア:

[(1, 21919947), (3, 7306649), (7, 3131421), (21, 1043807), (37, 592431), (111, 197477), (259, 84633), (777, 28211)]