20991460

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{149939}}^1$

素因数の和:149955

約数の個数: 24

約数和(自身を含む): 50379840

約数和(自身を除く): 29388380

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 149939, 299878, 599756, 749695, 1049573, 1499390, 2099146, 2998780, 4198292, 5247865, 10495730, 20991460]

約数ペア:

[(1, 20991460), (2, 10495730), (4, 5247865), (5, 4198292), (7, 2998780), (10, 2099146), (14, 1499390), (20, 1049573), (28, 749695), (35, 599756), (70, 299878), (140, 149939)]