21391533

素因数分解:

$3^5\times {\mathrm{47}}^1\times {\mathrm{1873}}^1$

素因数の和:1935

約数の個数: 24

約数和(自身を含む): 32742528

約数和(自身を除く): 11350995

約数列:

[1, 3, 9, 27, 47, 81, 141, 243, 423, 1269, 1873, 3807, 5619, 11421, 16857, 50571, 88031, 151713, 264093, 455139, 792279, 2376837, 7130511, 21391533]

約数ペア:

[(1, 21391533), (3, 7130511), (9, 2376837), (27, 792279), (47, 455139), (81, 264093), (141, 151713), (243, 88031), (423, 50571), (1269, 16857), (1873, 11421), (3807, 5619)]