19915263

素因数分解:

$3^2\times {\mathrm{23}}^2\times {\mathrm{47}}^1\times {\mathrm{89}}^1$

素因数の和:188

約数の個数: 36

約数和(自身を含む): 31056480

約数和(自身を除く): 11141217

約数列:

[1, 3, 9, 23, 47, 69, 89, 141, 207, 267, 423, 529, 801, 1081, 1587, 2047, 3243, 4183, 4761, 6141, 9729, 12549, 18423, 24863, 37647, 47081, 74589, 96209, 141243, 223767, 288627, 423729, 865881, 2212807, 6638421, 19915263]

約数ペア:

[(1, 19915263), (3, 6638421), (9, 2212807), (23, 865881), (47, 423729), (69, 288627), (89, 223767), (141, 141243), (207, 96209), (267, 74589), (423, 47081), (529, 37647), (801, 24863), (1081, 18423), (1587, 12549), (2047, 9729), (3243, 6141), (4183, 4761)]