21897519

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{54881}}^1$

素因数の和:54910

約数の個数: 16

約数和(自身を含む): 35124480

約数和(自身を除く): 13226961

約数列:

[1, 3, 7, 19, 21, 57, 133, 399, 54881, 164643, 384167, 1042739, 1152501, 3128217, 7299173, 21897519]

約数ペア:

[(1, 21897519), (3, 7299173), (7, 3128217), (19, 1152501), (21, 1042739), (57, 384167), (133, 164643), (399, 54881)]