80019520

素因数分解:

$2^6\times 5^1\times 7^1\times {\mathrm{139}}^1\times {\mathrm{257}}^1$

素因数の和:420

約数の個数: 112

約数和(自身を含む): 220187520

約数和(自身を除く): 140168000

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 56, 64, 70, 80, 112, 139, 140, 160, 224, 257, 278, 280, 320, 448, 514, 556, 560, 695, 973, 1028, 1112, 1120, 1285, 1390, 1799, 1946, 2056, 2224, 2240, 2570, 2780, 3598, 3892, 4112, 4448, 4865, 5140, 5560, 7196, 7784, 8224, 8896, 8995, 9730, 10280, 11120, 14392, 15568, 16448, 17990, 19460, 20560, 22240, 28784, 31136, 35723, 35980, 38920, 41120, 44480, 57568, 62272, 71446, 71960, 77840, 82240, 115136, 142892, 143920, 155680, 178615, 250061, 285784, 287840, 311360, 357230, 500122, 571568, 575680, 714460, 1000244, 1143136, 1250305, 1428920, 2000488, 2286272, 2500610, 2857840, 4000976, 5001220, 5715680, 8001952, 10002440, 11431360, 16003904, 20004880, 40009760, 80019520]

約数ペア:

[(1, 80019520), (2, 40009760), (4, 20004880), (5, 16003904), (7, 11431360), (8, 10002440), (10, 8001952), (14, 5715680), (16, 5001220), (20, 4000976), (28, 2857840), (32, 2500610), (35, 2286272), (40, 2000488), (56, 1428920), (64, 1250305), (70, 1143136), (80, 1000244), (112, 714460), (139, 575680), (140, 571568), (160, 500122), (224, 357230), (257, 311360), (278, 287840), (280, 285784), (320, 250061), (448, 178615), (514, 155680), (556, 143920), (560, 142892), (695, 115136), (973, 82240), (1028, 77840), (1112, 71960), (1120, 71446), (1285, 62272), (1390, 57568), (1799, 44480), (1946, 41120), (2056, 38920), (2224, 35980), (2240, 35723), (2570, 31136), (2780, 28784), (3598, 22240), (3892, 20560), (4112, 19460), (4448, 17990), (4865, 16448), (5140, 15568), (5560, 14392), (7196, 11120), (7784, 10280), (8224, 9730), (8896, 8995)]