21287942

素因数分解:

$2^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{43093}}^1$

素因数の和:43127

約数の個数: 16

約数和(自身を含む): 36198960

約数和(自身を除く): 14911018

約数列:

[1, 2, 13, 19, 26, 38, 247, 494, 43093, 86186, 560209, 818767, 1120418, 1637534, 10643971, 21287942]

約数ペア:

[(1, 21287942), (2, 10643971), (13, 1637534), (19, 1120418), (26, 818767), (38, 560209), (247, 86186), (494, 43093)]