21667821

素因数分解:

$3^1\times 7^1\times {\mathrm{107}}^1\times {\mathrm{9643}}^1$

素因数の和:9760

約数の個数: 16

約数和(自身を含む): 33329664

約数和(自身を除く): 11661843

約数列:

[1, 3, 7, 21, 107, 321, 749, 2247, 9643, 28929, 67501, 202503, 1031801, 3095403, 7222607, 21667821]

約数ペア:

[(1, 21667821), (3, 7222607), (7, 3095403), (21, 1031801), (107, 202503), (321, 67501), (749, 28929), (2247, 9643)]