21088065

素因数分解:

$3^1\times 5^1\times {\mathrm{71}}^1\times {\mathrm{19801}}^1$

素因数の和:19880

約数の個数: 16

約数和(自身を含む): 34217856

約数和(自身を除く): 13129791

約数列:

[1, 3, 5, 15, 71, 213, 355, 1065, 19801, 59403, 99005, 297015, 1405871, 4217613, 7029355, 21088065]

約数ペア:

[(1, 21088065), (3, 7029355), (5, 4217613), (15, 1405871), (71, 297015), (213, 99005), (355, 59403), (1065, 19801)]