21385959

素因数分解:

$3^1\times 7^1\times {\mathrm{239}}^1\times {\mathrm{4261}}^1$

素因数の和:4510

約数の個数: 16

約数和(自身を含む): 32732160

約数和(自身を除く): 11346201

約数列:

[1, 3, 7, 21, 239, 717, 1673, 4261, 5019, 12783, 29827, 89481, 1018379, 3055137, 7128653, 21385959]

約数ペア:

[(1, 21385959), (3, 7128653), (7, 3055137), (21, 1018379), (239, 89481), (717, 29827), (1673, 12783), (4261, 5019)]