20968628

素因数分解:

$2^2\times {\mathrm{19}}^1\times {\mathrm{61}}^1\times {\mathrm{4523}}^1$

素因数の和:4607

約数の個数: 24

約数和(自身を含む): 39268320

約数和(自身を除く): 18299692

約数列:

[1, 2, 4, 19, 38, 61, 76, 122, 244, 1159, 2318, 4523, 4636, 9046, 18092, 85937, 171874, 275903, 343748, 551806, 1103612, 5242157, 10484314, 20968628]

約数ペア:

[(1, 20968628), (2, 10484314), (4, 5242157), (19, 1103612), (38, 551806), (61, 343748), (76, 275903), (122, 171874), (244, 85937), (1159, 18092), (2318, 9046), (4523, 4636)]