19720305

素因数分解:

$3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{39839}}^1$

素因数の和:39861

約数の個数: 24

約数和(自身を含む): 37290240

約数和(自身を除く): 17569935

約数列:

[1, 3, 5, 9, 11, 15, 33, 45, 55, 99, 165, 495, 39839, 119517, 199195, 358551, 438229, 597585, 1314687, 1792755, 2191145, 3944061, 6573435, 19720305]

約数ペア:

[(1, 19720305), (3, 6573435), (5, 3944061), (9, 2191145), (11, 1792755), (15, 1314687), (33, 597585), (45, 438229), (55, 358551), (99, 199195), (165, 119517), (495, 39839)]