21001075

素因数分解:

$5^2\times {\mathrm{29}}^1\times {\mathrm{83}}^1\times {\mathrm{349}}^1$

素因数の和:471

約数の個数: 24

約数和(自身を含む): 27342000

約数和(自身を除く): 6340925

約数列:

[1, 5, 25, 29, 83, 145, 349, 415, 725, 1745, 2075, 2407, 8725, 10121, 12035, 28967, 50605, 60175, 144835, 253025, 724175, 840043, 4200215, 21001075]

約数ペア:

[(1, 21001075), (5, 4200215), (25, 840043), (29, 724175), (83, 253025), (145, 144835), (349, 60175), (415, 50605), (725, 28967), (1745, 12035), (2075, 10121), (2407, 8725)]