19919536

素因数分解:

$2^4\times 7^1\times {\mathrm{13}}^1\times {\mathrm{13681}}^1$

素因数の和:13709

約数の個数: 40

約数和(自身を含む): 47503904

約数和(自身を除く): 27584368

約数列:

[1, 2, 4, 7, 8, 13, 14, 16, 26, 28, 52, 56, 91, 104, 112, 182, 208, 364, 728, 1456, 13681, 27362, 54724, 95767, 109448, 177853, 191534, 218896, 355706, 383068, 711412, 766136, 1244971, 1422824, 1532272, 2489942, 2845648, 4979884, 9959768, 19919536]

約数ペア:

[(1, 19919536), (2, 9959768), (4, 4979884), (7, 2845648), (8, 2489942), (13, 1532272), (14, 1422824), (16, 1244971), (26, 766136), (28, 711412), (52, 383068), (56, 355706), (91, 218896), (104, 191534), (112, 177853), (182, 109448), (208, 95767), (364, 54724), (728, 27362), (1456, 13681)]