21305053

素因数分解:

$7^2\times {\mathrm{11}}^1\times {\mathrm{29}}^2\times {\mathrm{47}}^1$

素因数の和:130

約数の個数: 36

約数和(自身を含む): 28596672

約数和(自身を除く): 7291619

約数列:

[1, 7, 11, 29, 47, 49, 77, 203, 319, 329, 517, 539, 841, 1363, 1421, 2233, 2303, 3619, 5887, 9251, 9541, 14993, 15631, 25333, 39527, 41209, 64757, 66787, 104951, 276689, 434797, 453299, 734657, 1936823, 3043579, 21305053]

約数ペア:

[(1, 21305053), (7, 3043579), (11, 1936823), (29, 734657), (47, 453299), (49, 434797), (77, 276689), (203, 104951), (319, 66787), (329, 64757), (517, 41209), (539, 39527), (841, 25333), (1363, 15631), (1421, 14993), (2233, 9541), (2303, 9251), (3619, 5887)]