19521460

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{139439}}^1$

素因数の和:139455

約数の個数: 24

約数和(自身を含む): 46851840

約数和(自身を除く): 27330380

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 139439, 278878, 557756, 697195, 976073, 1394390, 1952146, 2788780, 3904292, 4880365, 9760730, 19521460]

約数ペア:

[(1, 19521460), (2, 9760730), (4, 4880365), (5, 3904292), (7, 2788780), (10, 1952146), (14, 1394390), (20, 976073), (28, 697195), (35, 557756), (70, 278878), (140, 139439)]