19985745

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{113}}^1\times {\mathrm{907}}^1$

素因数の和:1041

約数の個数: 32

約数和(自身を含む): 34780032

約数和(自身を除く): 14794287

約数列:

[1, 3, 5, 13, 15, 39, 65, 113, 195, 339, 565, 907, 1469, 1695, 2721, 4407, 4535, 7345, 11791, 13605, 22035, 35373, 58955, 102491, 176865, 307473, 512455, 1332383, 1537365, 3997149, 6661915, 19985745]

約数ペア:

[(1, 19985745), (3, 6661915), (5, 3997149), (13, 1537365), (15, 1332383), (39, 512455), (65, 307473), (113, 176865), (195, 102491), (339, 58955), (565, 35373), (907, 22035), (1469, 13605), (1695, 11791), (2721, 7345), (4407, 4535)]