20743569

素因数分解:

$3^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{809}}^1$

素因数の和:870

約数の個数: 48

約数和(自身を含む): 38413440

約数和(自身を除く): 17669871

約数列:

[1, 3, 7, 9, 11, 21, 33, 37, 63, 77, 99, 111, 231, 259, 333, 407, 693, 777, 809, 1221, 2331, 2427, 2849, 3663, 5663, 7281, 8547, 8899, 16989, 25641, 26697, 29933, 50967, 62293, 80091, 89799, 186879, 209531, 269397, 329263, 560637, 628593, 987789, 1885779, 2304841, 2963367, 6914523, 20743569]

約数ペア:

[(1, 20743569), (3, 6914523), (7, 2963367), (9, 2304841), (11, 1885779), (21, 987789), (33, 628593), (37, 560637), (63, 329263), (77, 269397), (99, 209531), (111, 186879), (231, 89799), (259, 80091), (333, 62293), (407, 50967), (693, 29933), (777, 26697), (809, 25641), (1221, 16989), (2331, 8899), (2427, 8547), (2849, 7281), (3663, 5663)]