19940781

素因数分解:

$3^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{30631}}^1$

素因数の和:30672

約数の個数: 16

約数和(自身を含む): 31367168

約数和(自身を除く): 11426387

約数列:

[1, 3, 7, 21, 31, 93, 217, 651, 30631, 91893, 214417, 643251, 949561, 2848683, 6646927, 19940781]

約数ペア:

[(1, 19940781), (3, 6646927), (7, 2848683), (21, 949561), (31, 643251), (93, 214417), (217, 91893), (651, 30631)]