21478256

素因数分解:

$2^4\times {\mathrm{101}}^1\times {\mathrm{13291}}^1$

素因数の和:13400

約数の個数: 20

約数和(自身を含む): 42029304

約数和(自身を除く): 20551048

約数列:

[1, 2, 4, 8, 16, 101, 202, 404, 808, 1616, 13291, 26582, 53164, 106328, 212656, 1342391, 2684782, 5369564, 10739128, 21478256]

約数ペア:

[(1, 21478256), (2, 10739128), (4, 5369564), (8, 2684782), (16, 1342391), (101, 212656), (202, 106328), (404, 53164), (808, 26582), (1616, 13291)]