20856836

素因数分解:

$2^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{5209}}^1$

素因数の和:5244

約数の個数: 48

約数和(自身を含む): 49015680

約数和(自身を除く): 28158844

約数列:

[1, 2, 4, 7, 11, 13, 14, 22, 26, 28, 44, 52, 77, 91, 143, 154, 182, 286, 308, 364, 572, 1001, 2002, 4004, 5209, 10418, 20836, 36463, 57299, 67717, 72926, 114598, 135434, 145852, 229196, 270868, 401093, 474019, 744887, 802186, 948038, 1489774, 1604372, 1896076, 2979548, 5214209, 10428418, 20856836]

約数ペア:

[(1, 20856836), (2, 10428418), (4, 5214209), (7, 2979548), (11, 1896076), (13, 1604372), (14, 1489774), (22, 948038), (26, 802186), (28, 744887), (44, 474019), (52, 401093), (77, 270868), (91, 229196), (143, 145852), (154, 135434), (182, 114598), (286, 72926), (308, 67717), (364, 57299), (572, 36463), (1001, 20836), (2002, 10418), (4004, 5209)]