31440213

素因数分解:

$3^2\times 7^2\times {\mathrm{71293}}^1$

素因数の和:71313

約数の個数: 18

約数和(自身を含む): 52828854

約数和(自身を除く): 21388641

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 441, 71293, 213879, 499051, 641637, 1497153, 3493357, 4491459, 10480071, 31440213]

約数ペア:

[(1, 31440213), (3, 10480071), (7, 4491459), (9, 3493357), (21, 1497153), (49, 641637), (63, 499051), (147, 213879), (441, 71293)]