21039579

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{461}}^2$

素因数の和:939

約数の個数: 18

約数和(自身を含む): 33225348

約数和(自身を除く): 12185769

約数列:

[1, 3, 9, 11, 33, 99, 461, 1383, 4149, 5071, 15213, 45639, 212521, 637563, 1912689, 2337731, 7013193, 21039579]

約数ペア:

[(1, 21039579), (3, 7013193), (9, 2337731), (11, 1912689), (33, 637563), (99, 212521), (461, 45639), (1383, 15213), (4149, 5071)]