21186669

素因数分解:

$3^1\times 7^2\times {\mathrm{101}}^1\times {\mathrm{1427}}^1$

素因数の和:1545

約数の個数: 24

約数和(自身を含む): 33209568

約数和(自身を除く): 12022899

約数列:

[1, 3, 7, 21, 49, 101, 147, 303, 707, 1427, 2121, 4281, 4949, 9989, 14847, 29967, 69923, 144127, 209769, 432381, 1008889, 3026667, 7062223, 21186669]

約数ペア:

[(1, 21186669), (3, 7062223), (7, 3026667), (21, 1008889), (49, 432381), (101, 209769), (147, 144127), (303, 69923), (707, 29967), (1427, 14847), (2121, 9989), (4281, 4949)]