181580

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{1297}}^1$

素因数の和:1313

約数の個数: 24

約数和(自身を含む): 436128

約数和(自身を除く): 254548

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 1297, 2594, 5188, 6485, 9079, 12970, 18158, 25940, 36316, 45395, 90790, 181580]

約数ペア:

[(1, 181580), (2, 90790), (4, 45395), (5, 36316), (7, 25940), (10, 18158), (14, 12970), (20, 9079), (28, 6485), (35, 5188), (70, 2594), (140, 1297)]