21431480

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{76541}}^1$

素因数の和:76559

約数の個数: 32

約数和(自身を含む): 55110240

約数和(自身を除く): 33678760

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 76541, 153082, 306164, 382705, 535787, 612328, 765410, 1071574, 1530820, 2143148, 2678935, 3061640, 4286296, 5357870, 10715740, 21431480]

約数ペア:

[(1, 21431480), (2, 10715740), (4, 5357870), (5, 4286296), (7, 3061640), (8, 2678935), (10, 2143148), (14, 1530820), (20, 1071574), (28, 765410), (35, 612328), (40, 535787), (56, 382705), (70, 306164), (140, 153082), (280, 76541)]