21139455

素因数分解:

$3^1\times 5^1\times {\mathrm{107}}^1\times {\mathrm{13171}}^1$

素因数の和:13286

約数の個数: 16

約数和(自身を含む): 34141824

約数和(自身を除く): 13002369

約数列:

[1, 3, 5, 15, 107, 321, 535, 1605, 13171, 39513, 65855, 197565, 1409297, 4227891, 7046485, 21139455]

約数ペア:

[(1, 21139455), (3, 7046485), (5, 4227891), (15, 1409297), (107, 197565), (321, 65855), (535, 39513), (1605, 13171)]