21657440

素因数分解:

$2^5\times 5^1\times 7^1\times {\mathrm{61}}^1\times {\mathrm{317}}^1$

素因数の和:400

約数の個数: 96

約数和(自身を含む): 59621184

約数和(自身を除く): 37963744

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 56, 61, 70, 80, 112, 122, 140, 160, 224, 244, 280, 305, 317, 427, 488, 560, 610, 634, 854, 976, 1120, 1220, 1268, 1585, 1708, 1952, 2135, 2219, 2440, 2536, 3170, 3416, 4270, 4438, 4880, 5072, 6340, 6832, 8540, 8876, 9760, 10144, 11095, 12680, 13664, 17080, 17752, 19337, 22190, 25360, 34160, 35504, 38674, 44380, 50720, 68320, 71008, 77348, 88760, 96685, 135359, 154696, 177520, 193370, 270718, 309392, 355040, 386740, 541436, 618784, 676795, 773480, 1082872, 1353590, 1546960, 2165744, 2707180, 3093920, 4331488, 5414360, 10828720, 21657440]

約数ペア:

[(1, 21657440), (2, 10828720), (4, 5414360), (5, 4331488), (7, 3093920), (8, 2707180), (10, 2165744), (14, 1546960), (16, 1353590), (20, 1082872), (28, 773480), (32, 676795), (35, 618784), (40, 541436), (56, 386740), (61, 355040), (70, 309392), (80, 270718), (112, 193370), (122, 177520), (140, 154696), (160, 135359), (224, 96685), (244, 88760), (280, 77348), (305, 71008), (317, 68320), (427, 50720), (488, 44380), (560, 38674), (610, 35504), (634, 34160), (854, 25360), (976, 22190), (1120, 19337), (1220, 17752), (1268, 17080), (1585, 13664), (1708, 12680), (1952, 11095), (2135, 10144), (2219, 9760), (2440, 8876), (2536, 8540), (3170, 6832), (3416, 6340), (4270, 5072), (4438, 4880)]