20787819

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{89}}^1\times {\mathrm{113}}^1$

素因数の和:271

約数の個数: 32

約数和(自身を含む): 31026240

約数和(自身を除く): 10238421

約数列:

[1, 3, 13, 39, 53, 89, 113, 159, 267, 339, 689, 1157, 1469, 2067, 3471, 4407, 4717, 5989, 10057, 14151, 17967, 30171, 61321, 77857, 130741, 183963, 233571, 392223, 533021, 1599063, 6929273, 20787819]

約数ペア:

[(1, 20787819), (3, 6929273), (13, 1599063), (39, 533021), (53, 392223), (89, 233571), (113, 183963), (159, 130741), (267, 77857), (339, 61321), (689, 30171), (1157, 17967), (1469, 14151), (2067, 10057), (3471, 5989), (4407, 4717)]