21249488

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{102161}}^1$

素因数の和:102182

約数の個数: 20

約数和(自身を含む): 44338308

約数和(自身を除く): 23088820

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 102161, 204322, 408644, 817288, 1328093, 1634576, 2656186, 5312372, 10624744, 21249488]

約数ペア:

[(1, 21249488), (2, 10624744), (4, 5312372), (8, 2656186), (13, 1634576), (16, 1328093), (26, 817288), (52, 408644), (104, 204322), (208, 102161)]