21456585

素因数分解:

$3^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{20731}}^1$

素因数の和:20765

約数の個数: 24

約数和(自身を含む): 38810304

約数和(自身を除く): 17353719

約数列:

[1, 3, 5, 9, 15, 23, 45, 69, 115, 207, 345, 1035, 20731, 62193, 103655, 186579, 310965, 476813, 932895, 1430439, 2384065, 4291317, 7152195, 21456585]

約数ペア:

[(1, 21456585), (3, 7152195), (5, 4291317), (9, 2384065), (15, 1430439), (23, 932895), (45, 476813), (69, 310965), (115, 186579), (207, 103655), (345, 62193), (1035, 20731)]