21395456

素因数分解:

$2^{11}\times {\mathrm{31}}^1\times {\mathrm{337}}^1$

素因数の和:390

約数の個数: 48

約数和(自身を含む): 44291520

約数和(自身を除く): 22896064

約数列:

[1, 2, 4, 8, 16, 31, 32, 62, 64, 124, 128, 248, 256, 337, 496, 512, 674, 992, 1024, 1348, 1984, 2048, 2696, 3968, 5392, 7936, 10447, 10784, 15872, 20894, 21568, 31744, 41788, 43136, 63488, 83576, 86272, 167152, 172544, 334304, 345088, 668608, 690176, 1337216, 2674432, 5348864, 10697728, 21395456]

約数ペア:

[(1, 21395456), (2, 10697728), (4, 5348864), (8, 2674432), (16, 1337216), (31, 690176), (32, 668608), (62, 345088), (64, 334304), (124, 172544), (128, 167152), (248, 86272), (256, 83576), (337, 63488), (496, 43136), (512, 41788), (674, 31744), (992, 21568), (1024, 20894), (1348, 15872), (1984, 10784), (2048, 10447), (2696, 7936), (3968, 5392)]