21542825

素因数分解:

$5^2\times {\mathrm{17}}^1\times {\mathrm{173}}^1\times {\mathrm{293}}^1$

素因数の和:493

約数の個数: 24

約数和(自身を含む): 28545048

約数和(自身を除く): 7002223

約数列:

[1, 5, 17, 25, 85, 173, 293, 425, 865, 1465, 2941, 4325, 4981, 7325, 14705, 24905, 50689, 73525, 124525, 253445, 861713, 1267225, 4308565, 21542825]

約数ペア:

[(1, 21542825), (5, 4308565), (17, 1267225), (25, 861713), (85, 253445), (173, 124525), (293, 73525), (425, 50689), (865, 24905), (1465, 14705), (2941, 7325), (4325, 4981)]