20665456

素因数分解:

$2^4\times 7^2\times {\mathrm{43}}^1\times {\mathrm{613}}^1$

素因数の和:678

約数の個数: 60

約数和(自身を含む): 47737272

約数和(自身を除く): 27071816

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 43, 49, 56, 86, 98, 112, 172, 196, 301, 344, 392, 602, 613, 688, 784, 1204, 1226, 2107, 2408, 2452, 4214, 4291, 4816, 4904, 8428, 8582, 9808, 16856, 17164, 26359, 30037, 33712, 34328, 52718, 60074, 68656, 105436, 120148, 184513, 210872, 240296, 369026, 421744, 480592, 738052, 1291591, 1476104, 2583182, 2952208, 5166364, 10332728, 20665456]

約数ペア:

[(1, 20665456), (2, 10332728), (4, 5166364), (7, 2952208), (8, 2583182), (14, 1476104), (16, 1291591), (28, 738052), (43, 480592), (49, 421744), (56, 369026), (86, 240296), (98, 210872), (112, 184513), (172, 120148), (196, 105436), (301, 68656), (344, 60074), (392, 52718), (602, 34328), (613, 33712), (688, 30037), (784, 26359), (1204, 17164), (1226, 16856), (2107, 9808), (2408, 8582), (2452, 8428), (4214, 4904), (4291, 4816)]