139580

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{997}}^1$

素因数の和:1013

約数の個数: 24

約数和(自身を含む): 335328

約数和(自身を除く): 195748

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 997, 1994, 3988, 4985, 6979, 9970, 13958, 19940, 27916, 34895, 69790, 139580]

約数ペア:

[(1, 139580), (2, 69790), (4, 34895), (5, 27916), (7, 19940), (10, 13958), (14, 9970), (20, 6979), (28, 4985), (35, 3988), (70, 1994), (140, 997)]