19788140

素因数分解:

$2^2\times 5^1\times {\mathrm{809}}^1\times {\mathrm{1223}}^1$

素因数の和:2041

約数の個数: 24

約数和(自身を含む): 41640480

約数和(自身を除く): 21852340

約数列:

[1, 2, 4, 5, 10, 20, 809, 1223, 1618, 2446, 3236, 4045, 4892, 6115, 8090, 12230, 16180, 24460, 989407, 1978814, 3957628, 4947035, 9894070, 19788140]

約数ペア:

[(1, 19788140), (2, 9894070), (4, 4947035), (5, 3957628), (10, 1978814), (20, 989407), (809, 24460), (1223, 16180), (1618, 12230), (2446, 8090), (3236, 6115), (4045, 4892)]