21396519

素因数分解:

$3^2\times {\mathrm{29}}^1\times {\mathrm{73}}^1\times {\mathrm{1123}}^1$

素因数の和:1231

約数の個数: 24

約数和(自身を含む): 32438640

約数和(自身を除く): 11042121

約数列:

[1, 3, 9, 29, 73, 87, 219, 261, 657, 1123, 2117, 3369, 6351, 10107, 19053, 32567, 81979, 97701, 245937, 293103, 737811, 2377391, 7132173, 21396519]

約数ペア:

[(1, 21396519), (3, 7132173), (9, 2377391), (29, 737811), (73, 293103), (87, 245937), (219, 97701), (261, 81979), (657, 32567), (1123, 19053), (2117, 10107), (3369, 6351)]