21985912

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{211403}}^1$

素因数の和:211422

約数の個数: 16

約数和(自身を含む): 44394840

約数和(自身を除く): 22408928

約数列:

[1, 2, 4, 8, 13, 26, 52, 104, 211403, 422806, 845612, 1691224, 2748239, 5496478, 10992956, 21985912]

約数ペア:

[(1, 21985912), (2, 10992956), (4, 5496478), (8, 2748239), (13, 1691224), (26, 845612), (52, 422806), (104, 211403)]