21440300

素因数分解:

$2^2\times 5^2\times 7^1\times {\mathrm{109}}^1\times {\mathrm{281}}^1$

素因数の和:411

約数の個数: 72

約数和(自身を含む): 53850720

約数和(自身を除く): 32410420

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 25, 28, 35, 50, 70, 100, 109, 140, 175, 218, 281, 350, 436, 545, 562, 700, 763, 1090, 1124, 1405, 1526, 1967, 2180, 2725, 2810, 3052, 3815, 3934, 5450, 5620, 7025, 7630, 7868, 9835, 10900, 14050, 15260, 19075, 19670, 28100, 30629, 38150, 39340, 49175, 61258, 76300, 98350, 122516, 153145, 196700, 214403, 306290, 428806, 612580, 765725, 857612, 1072015, 1531450, 2144030, 3062900, 4288060, 5360075, 10720150, 21440300]

約数ペア:

[(1, 21440300), (2, 10720150), (4, 5360075), (5, 4288060), (7, 3062900), (10, 2144030), (14, 1531450), (20, 1072015), (25, 857612), (28, 765725), (35, 612580), (50, 428806), (70, 306290), (100, 214403), (109, 196700), (140, 153145), (175, 122516), (218, 98350), (281, 76300), (350, 61258), (436, 49175), (545, 39340), (562, 38150), (700, 30629), (763, 28100), (1090, 19670), (1124, 19075), (1405, 15260), (1526, 14050), (1967, 10900), (2180, 9835), (2725, 7868), (2810, 7630), (3052, 7025), (3815, 5620), (3934, 5450)]