20639415

素因数分解:

$3^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{139}}^1\times {\mathrm{521}}^1$

素因数の和:687

約数の個数: 32

約数和(自身を含む): 35078400

約数和(自身を除く): 14438985

約数列:

[1, 3, 5, 15, 19, 57, 95, 139, 285, 417, 521, 695, 1563, 2085, 2605, 2641, 7815, 7923, 9899, 13205, 29697, 39615, 49495, 72419, 148485, 217257, 362095, 1086285, 1375961, 4127883, 6879805, 20639415]

約数ペア:

[(1, 20639415), (3, 6879805), (5, 4127883), (15, 1375961), (19, 1086285), (57, 362095), (95, 217257), (139, 148485), (285, 72419), (417, 49495), (521, 39615), (695, 29697), (1563, 13205), (2085, 9899), (2605, 7923), (2641, 7815)]