20877213

素因数分解:

$3^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{97}}^1\times {\mathrm{277}}^1$

素因数の和:421

約数の個数: 32

約数和(自身を含む): 33128704

約数和(自身を除く): 12251491

約数列:

[1, 3, 7, 21, 37, 97, 111, 259, 277, 291, 679, 777, 831, 1939, 2037, 3589, 5817, 10249, 10767, 25123, 26869, 30747, 71743, 75369, 80607, 188083, 215229, 564249, 994153, 2982459, 6959071, 20877213]

約数ペア:

[(1, 20877213), (3, 6959071), (7, 2982459), (21, 994153), (37, 564249), (97, 215229), (111, 188083), (259, 80607), (277, 75369), (291, 71743), (679, 30747), (777, 26869), (831, 25123), (1939, 10767), (2037, 10249), (3589, 5817)]