64939975

素因数分解:

$5^2\times {\mathrm{79}}^1\times {\mathrm{131}}^1\times {\mathrm{251}}^1$

素因数の和:471

約数の個数: 24

約数和(自身を含む): 82494720

約数和(自身を除く): 17554745

約数列:

[1, 5, 25, 79, 131, 251, 395, 655, 1255, 1975, 3275, 6275, 10349, 19829, 32881, 51745, 99145, 164405, 258725, 495725, 822025, 2597599, 12987995, 64939975]

約数ペア:

[(1, 64939975), (5, 12987995), (25, 2597599), (79, 822025), (131, 495725), (251, 258725), (395, 164405), (655, 99145), (1255, 51745), (1975, 32881), (3275, 19829), (6275, 10349)]