21659960

素因数分解:

$2^3\times 5^1\times 7^2\times {\mathrm{43}}^1\times {\mathrm{257}}^1$

素因数の和:325

約数の個数: 96

約数和(自身を含む): 58235760

約数和(自身を除く): 36575800

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 43, 49, 56, 70, 86, 98, 140, 172, 196, 215, 245, 257, 280, 301, 344, 392, 430, 490, 514, 602, 860, 980, 1028, 1204, 1285, 1505, 1720, 1799, 1960, 2056, 2107, 2408, 2570, 3010, 3598, 4214, 5140, 6020, 7196, 8428, 8995, 10280, 10535, 11051, 12040, 12593, 14392, 16856, 17990, 21070, 22102, 25186, 35980, 42140, 44204, 50372, 55255, 62965, 71960, 77357, 84280, 88408, 100744, 110510, 125930, 154714, 221020, 251860, 309428, 386785, 442040, 503720, 541499, 618856, 773570, 1082998, 1547140, 2165996, 2707495, 3094280, 4331992, 5414990, 10829980, 21659960]

約数ペア:

[(1, 21659960), (2, 10829980), (4, 5414990), (5, 4331992), (7, 3094280), (8, 2707495), (10, 2165996), (14, 1547140), (20, 1082998), (28, 773570), (35, 618856), (40, 541499), (43, 503720), (49, 442040), (56, 386785), (70, 309428), (86, 251860), (98, 221020), (140, 154714), (172, 125930), (196, 110510), (215, 100744), (245, 88408), (257, 84280), (280, 77357), (301, 71960), (344, 62965), (392, 55255), (430, 50372), (490, 44204), (514, 42140), (602, 35980), (860, 25186), (980, 22102), (1028, 21070), (1204, 17990), (1285, 16856), (1505, 14392), (1720, 12593), (1799, 12040), (1960, 11051), (2056, 10535), (2107, 10280), (2408, 8995), (2570, 8428), (3010, 7196), (3598, 6020), (4214, 5140)]