21420765185

素因数分解:

$5^1\times {\mathrm{61}}^1\times {\mathrm{167}}^1\times {\mathrm{420551}}^1$

素因数の和:420784

約数の個数: 16

約数和(自身を含む): 26282817792

約数和(自身を除く): 4862052607

約数列:

[1, 5, 61, 167, 305, 835, 10187, 50935, 420551, 2102755, 25653611, 70232017, 128268055, 351160085, 4284153037, 21420765185]

約数ペア:

[(1, 21420765185), (5, 4284153037), (61, 351160085), (167, 128268055), (305, 70232017), (835, 25653611), (10187, 2102755), (50935, 420551)]