21681712

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{104239}}^1$

素因数の和:104260

約数の個数: 20

約数和(自身を含む): 45240160

約数和(自身を除く): 23558448

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 104239, 208478, 416956, 833912, 1355107, 1667824, 2710214, 5420428, 10840856, 21681712]

約数ペア:

[(1, 21681712), (2, 10840856), (4, 5420428), (8, 2710214), (13, 1667824), (16, 1355107), (26, 833912), (52, 416956), (104, 208478), (208, 104239)]