21342879

素因数分解:

$3^3\times {\mathrm{509}}^1\times {\mathrm{1553}}^1$

素因数の和:2071

約数の個数: 16

約数和(自身を含む): 31701600

約数和(自身を除く): 10358721

約数列:

[1, 3, 9, 27, 509, 1527, 1553, 4581, 4659, 13743, 13977, 41931, 790477, 2371431, 7114293, 21342879]

約数ペア:

[(1, 21342879), (3, 7114293), (9, 2371431), (27, 790477), (509, 41931), (1527, 13977), (1553, 13743), (4581, 4659)]