21425457

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{61}}^1\times {\mathrm{71}}^1\times {\mathrm{97}}^1$

素因数の和:249

約数の個数: 32

約数和(自身を含む): 31497984

約数和(自身を除く): 10072527

約数列:

[1, 3, 17, 51, 61, 71, 97, 183, 213, 291, 1037, 1207, 1649, 3111, 3621, 4331, 4947, 5917, 6887, 12993, 17751, 20661, 73627, 100589, 117079, 220881, 301767, 351237, 420107, 1260321, 7141819, 21425457]

約数ペア:

[(1, 21425457), (3, 7141819), (17, 1260321), (51, 420107), (61, 351237), (71, 301767), (97, 220881), (183, 117079), (213, 100589), (291, 73627), (1037, 20661), (1207, 17751), (1649, 12993), (3111, 6887), (3621, 5917), (4331, 4947)]