21320685

素因数分解:

$3^3\times 5^1\times {\mathrm{157931}}^1$

素因数の和:157945

約数の個数: 16

約数和(自身を含む): 37903680

約数和(自身を除く): 16582995

約数列:

[1, 3, 5, 9, 15, 27, 45, 135, 157931, 473793, 789655, 1421379, 2368965, 4264137, 7106895, 21320685]

約数ペア:

[(1, 21320685), (3, 7106895), (5, 4264137), (9, 2368965), (15, 1421379), (27, 789655), (45, 473793), (135, 157931)]