19917681

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{49919}}^1$

素因数の和:49948

約数の個数: 16

約数和(自身を含む): 31948800

約数和(自身を除く): 12031119

約数列:

[1, 3, 7, 19, 21, 57, 133, 399, 49919, 149757, 349433, 948461, 1048299, 2845383, 6639227, 19917681]

約数ペア:

[(1, 19917681), (3, 6639227), (7, 2845383), (19, 1048299), (21, 948461), (57, 349433), (133, 149757), (399, 49919)]