21616972

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{199}}^1\times {\mathrm{2089}}^1$

素因数の和:2305

約数の個数: 24

約数和(自身を含む): 40964000

約数和(自身を除く): 19347028

約数列:

[1, 2, 4, 13, 26, 52, 199, 398, 796, 2089, 2587, 4178, 5174, 8356, 10348, 27157, 54314, 108628, 415711, 831422, 1662844, 5404243, 10808486, 21616972]

約数ペア:

[(1, 21616972), (2, 10808486), (4, 5404243), (13, 1662844), (26, 831422), (52, 415711), (199, 108628), (398, 54314), (796, 27157), (2089, 10348), (2587, 8356), (4178, 5174)]