21987339

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{21493}}^1$

素因数の和:21538

約数の個数: 16

約数和(自身を含む): 33014784

約数和(自身を除く): 11027445

約数列:

[1, 3, 11, 31, 33, 93, 341, 1023, 21493, 64479, 236423, 666283, 709269, 1998849, 7329113, 21987339]

約数ペア:

[(1, 21987339), (3, 7329113), (11, 1998849), (31, 709269), (33, 666283), (93, 236423), (341, 64479), (1023, 21493)]