21178821

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{415271}}^1$

素因数の和:415291

約数の個数: 8

約数和(自身を含む): 29899584

約数和(自身を除く): 8720763

約数列:

[1, 3, 17, 51, 415271, 1245813, 7059607, 21178821]

約数ペア:

[(1, 21178821), (3, 7059607), (17, 1245813), (51, 415271)]