18387220

素因数分解:

$2^2\times 5^1\times {\mathrm{829}}^1\times {\mathrm{1109}}^1$

素因数の和:1947

約数の個数: 24

約数和(自身を含む): 38694600

約数和(自身を除く): 20307380

約数列:

[1, 2, 4, 5, 10, 20, 829, 1109, 1658, 2218, 3316, 4145, 4436, 5545, 8290, 11090, 16580, 22180, 919361, 1838722, 3677444, 4596805, 9193610, 18387220]

約数ペア:

[(1, 18387220), (2, 9193610), (4, 4596805), (5, 3677444), (10, 1838722), (20, 919361), (829, 22180), (1109, 16580), (1658, 11090), (2218, 8290), (3316, 5545), (4145, 4436)]