20556879

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{51521}}^1$

素因数の和:51550

約数の個数: 16

約数和(自身を含む): 32974080

約数和(自身を除く): 12417201

約数列:

[1, 3, 7, 19, 21, 57, 133, 399, 51521, 154563, 360647, 978899, 1081941, 2936697, 6852293, 20556879]

約数ペア:

[(1, 20556879), (3, 6852293), (7, 2936697), (19, 1081941), (21, 978899), (57, 360647), (133, 154563), (399, 51521)]