21515416

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{206879}}^1$

素因数の和:206898

約数の個数: 16

約数和(自身を含む): 43444800

約数和(自身を除く): 21929384

約数列:

[1, 2, 4, 8, 13, 26, 52, 104, 206879, 413758, 827516, 1655032, 2689427, 5378854, 10757708, 21515416]

約数ペア:

[(1, 21515416), (2, 10757708), (4, 5378854), (8, 2689427), (13, 1655032), (26, 827516), (52, 413758), (104, 206879)]