18786428

素因数分解:

$2^2\times {\mathrm{17}}^1\times {\mathrm{431}}^1\times {\mathrm{641}}^1$

素因数の和:1093

約数の個数: 24

約数和(自身を含む): 34945344

約数和(自身を除く): 16158916

約数列:

[1, 2, 4, 17, 34, 68, 431, 641, 862, 1282, 1724, 2564, 7327, 10897, 14654, 21794, 29308, 43588, 276271, 552542, 1105084, 4696607, 9393214, 18786428]

約数ペア:

[(1, 18786428), (2, 9393214), (4, 4696607), (17, 1105084), (34, 552542), (68, 276271), (431, 43588), (641, 29308), (862, 21794), (1282, 14654), (1724, 10897), (2564, 7327)]