21456188

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{412619}}^1$

素因数の和:412636

約数の個数: 12

約数和(自身を含む): 40436760

約数和(自身を除く): 18980572

約数列:

[1, 2, 4, 13, 26, 52, 412619, 825238, 1650476, 5364047, 10728094, 21456188]

約数ペア:

[(1, 21456188), (2, 10728094), (4, 5364047), (13, 1650476), (26, 825238), (52, 412619)]