20091904

素因数分解:

$2^{10}\times 7^1\times {\mathrm{2803}}^1$

素因数の和:2830

約数の個数: 44

約数和(自身を含む): 45918304

約数和(自身を除く): 25826400

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 32, 56, 64, 112, 128, 224, 256, 448, 512, 896, 1024, 1792, 2803, 3584, 5606, 7168, 11212, 19621, 22424, 39242, 44848, 78484, 89696, 156968, 179392, 313936, 358784, 627872, 717568, 1255744, 1435136, 2511488, 2870272, 5022976, 10045952, 20091904]

約数ペア:

[(1, 20091904), (2, 10045952), (4, 5022976), (7, 2870272), (8, 2511488), (14, 1435136), (16, 1255744), (28, 717568), (32, 627872), (56, 358784), (64, 313936), (112, 179392), (128, 156968), (224, 89696), (256, 78484), (448, 44848), (512, 39242), (896, 22424), (1024, 19621), (1792, 11212), (2803, 7168), (3584, 5606)]