21491054

素因数分解:

$2^1\times {\mathrm{13}}^3\times {\mathrm{67}}^1\times {\mathrm{73}}^1$

素因数の和:181

約数の個数: 32

約数和(自身を含む): 35928480

約数和(自身を除く): 14437426

約数列:

[1, 2, 13, 26, 67, 73, 134, 146, 169, 338, 871, 949, 1742, 1898, 2197, 4394, 4891, 9782, 11323, 12337, 22646, 24674, 63583, 127166, 147199, 160381, 294398, 320762, 826579, 1653158, 10745527, 21491054]

約数ペア:

[(1, 21491054), (2, 10745527), (13, 1653158), (26, 826579), (67, 320762), (73, 294398), (134, 160381), (146, 147199), (169, 127166), (338, 63583), (871, 24674), (949, 22646), (1742, 12337), (1898, 11323), (2197, 9782), (4394, 4891)]