1666404009

素因数分解:

$3^4\times {\mathrm{71}}^1\times {\mathrm{289759}}^1$

素因数の和:289842

約数の個数: 20

約数和(自身を含む): 2524389120

約数和(自身を除く): 857985111

約数列:

[1, 3, 9, 27, 71, 81, 213, 639, 1917, 5751, 289759, 869277, 2607831, 7823493, 20572889, 23470479, 61718667, 185156001, 555468003, 1666404009]

約数ペア:

[(1, 1666404009), (3, 555468003), (9, 185156001), (27, 61718667), (71, 23470479), (81, 20572889), (213, 7823493), (639, 2607831), (1917, 869277), (5751, 289759)]