19639389

素因数分解:

$3^1\times 7^1\times {\mathrm{11}}^2\times {\mathrm{59}}^1\times {\mathrm{131}}^1$

素因数の和:222

約数の個数: 48

約数和(自身を含む): 33707520

約数和(自身を除く): 14068131

約数列:

[1, 3, 7, 11, 21, 33, 59, 77, 121, 131, 177, 231, 363, 393, 413, 649, 847, 917, 1239, 1441, 1947, 2541, 2751, 4323, 4543, 7139, 7729, 10087, 13629, 15851, 21417, 23187, 30261, 47553, 49973, 54103, 85019, 110957, 149919, 162309, 255057, 332871, 595133, 935209, 1785399, 2805627, 6546463, 19639389]

約数ペア:

[(1, 19639389), (3, 6546463), (7, 2805627), (11, 1785399), (21, 935209), (33, 595133), (59, 332871), (77, 255057), (121, 162309), (131, 149919), (177, 110957), (231, 85019), (363, 54103), (393, 49973), (413, 47553), (649, 30261), (847, 23187), (917, 21417), (1239, 15851), (1441, 13629), (1947, 10087), (2541, 7729), (2751, 7139), (4323, 4543)]