21271460

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{151939}}^1$

素因数の和:151955

約数の個数: 24

約数和(自身を含む): 51051840

約数和(自身を除く): 29780380

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 151939, 303878, 607756, 759695, 1063573, 1519390, 2127146, 3038780, 4254292, 5317865, 10635730, 21271460]

約数ペア:

[(1, 21271460), (2, 10635730), (4, 5317865), (5, 4254292), (7, 3038780), (10, 2127146), (14, 1519390), (20, 1063573), (28, 759695), (35, 607756), (70, 303878), (140, 151939)]