18878985

素因数分解:

$3^2\times 5^1\times {\mathrm{281}}^1\times {\mathrm{1493}}^1$

素因数の和:1785

約数の個数: 24

約数和(自身を含む): 32862024

約数和(自身を除く): 13983039

約数列:

[1, 3, 5, 9, 15, 45, 281, 843, 1405, 1493, 2529, 4215, 4479, 7465, 12645, 13437, 22395, 67185, 419533, 1258599, 2097665, 3775797, 6292995, 18878985]

約数ペア:

[(1, 18878985), (3, 6292995), (5, 3775797), (9, 2097665), (15, 1258599), (45, 419533), (281, 67185), (843, 22395), (1405, 13437), (1493, 12645), (2529, 7465), (4215, 4479)]