20691945

素因数分解:

$3^2\times 5^1\times {\mathrm{67}}^1\times {\mathrm{6863}}^1$

素因数の和:6941

約数の個数: 24

約数和(自身を含む): 36406656

約数和(自身を除く): 15714711

約数列:

[1, 3, 5, 9, 15, 45, 67, 201, 335, 603, 1005, 3015, 6863, 20589, 34315, 61767, 102945, 308835, 459821, 1379463, 2299105, 4138389, 6897315, 20691945]

約数ペア:

[(1, 20691945), (3, 6897315), (5, 4138389), (9, 2299105), (15, 1379463), (45, 459821), (67, 308835), (201, 102945), (335, 61767), (603, 34315), (1005, 20589), (3015, 6863)]