31780

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{227}}^1$

素因数の和:243

約数の個数: 24

約数和(自身を含む): 76608

約数和(自身を除く): 44828

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 227, 454, 908, 1135, 1589, 2270, 3178, 4540, 6356, 7945, 15890, 31780]

約数ペア:

[(1, 31780), (2, 15890), (4, 7945), (5, 6356), (7, 4540), (10, 3178), (14, 2270), (20, 1589), (28, 1135), (35, 908), (70, 454), (140, 227)]