18455420

素因数分解:

$2^2\times 5^1\times {\mathrm{431}}^1\times {\mathrm{2141}}^1$

素因数の和:2581

約数の個数: 24

約数和(自身を含む): 38864448

約数和(自身を除く): 20409028

約数列:

[1, 2, 4, 5, 10, 20, 431, 862, 1724, 2141, 2155, 4282, 4310, 8564, 8620, 10705, 21410, 42820, 922771, 1845542, 3691084, 4613855, 9227710, 18455420]

約数ペア:

[(1, 18455420), (2, 9227710), (4, 4613855), (5, 3691084), (10, 1845542), (20, 922771), (431, 42820), (862, 21410), (1724, 10705), (2141, 8620), (2155, 8564), (4282, 4310)]