20913308

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{47}}^1\times {\mathrm{199}}^1$

素因数の和:306

約数の個数: 48

約数和(自身を含む): 41395200

約数和(自身を除く): 20481892

約数列:

[1, 2, 4, 13, 26, 43, 47, 52, 86, 94, 172, 188, 199, 398, 559, 611, 796, 1118, 1222, 2021, 2236, 2444, 2587, 4042, 5174, 8084, 8557, 9353, 10348, 17114, 18706, 26273, 34228, 37412, 52546, 105092, 111241, 121589, 222482, 243178, 402179, 444964, 486356, 804358, 1608716, 5228327, 10456654, 20913308]

約数ペア:

[(1, 20913308), (2, 10456654), (4, 5228327), (13, 1608716), (26, 804358), (43, 486356), (47, 444964), (52, 402179), (86, 243178), (94, 222482), (172, 121589), (188, 111241), (199, 105092), (398, 52546), (559, 37412), (611, 34228), (796, 26273), (1118, 18706), (1222, 17114), (2021, 10348), (2236, 9353), (2444, 8557), (2587, 8084), (4042, 5174)]