21394672

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{102859}}^1$

素因数の和:102880

約数の個数: 20

約数和(自身を含む): 44641240

約数和(自身を除く): 23246568

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 102859, 205718, 411436, 822872, 1337167, 1645744, 2674334, 5348668, 10697336, 21394672]

約数ペア:

[(1, 21394672), (2, 10697336), (4, 5348668), (8, 2674334), (13, 1645744), (16, 1337167), (26, 822872), (52, 411436), (104, 205718), (208, 102859)]