21188739

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{49391}}^1$

素因数の和:49418

約数の個数: 16

約数和(自身を含む): 33191424

約数和(自身を除く): 12002685

約数列:

[1, 3, 11, 13, 33, 39, 143, 429, 49391, 148173, 543301, 642083, 1629903, 1926249, 7062913, 21188739]

約数ペア:

[(1, 21188739), (3, 7062913), (11, 1926249), (13, 1629903), (33, 642083), (39, 543301), (143, 148173), (429, 49391)]