199780

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{1427}}^1$

素因数の和:1443

約数の個数: 24

約数和(自身を含む): 479808

約数和(自身を除く): 280028

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 1427, 2854, 5708, 7135, 9989, 14270, 19978, 28540, 39956, 49945, 99890, 199780]

約数ペア:

[(1, 199780), (2, 99890), (4, 49945), (5, 39956), (7, 28540), (10, 19978), (14, 14270), (20, 9989), (28, 7135), (35, 5708), (70, 2854), (140, 1427)]