20982784

素因数分解:

$2^{10}\times {\mathrm{31}}^1\times {\mathrm{661}}^1$

素因数の和:712

約数の個数: 44

約数和(自身を含む): 43363648

約数和(自身を除く): 22380864

約数列:

[1, 2, 4, 8, 16, 31, 32, 62, 64, 124, 128, 248, 256, 496, 512, 661, 992, 1024, 1322, 1984, 2644, 3968, 5288, 7936, 10576, 15872, 20491, 21152, 31744, 40982, 42304, 81964, 84608, 163928, 169216, 327856, 338432, 655712, 676864, 1311424, 2622848, 5245696, 10491392, 20982784]

約数ペア:

[(1, 20982784), (2, 10491392), (4, 5245696), (8, 2622848), (16, 1311424), (31, 676864), (32, 655712), (62, 338432), (64, 327856), (124, 169216), (128, 163928), (248, 84608), (256, 81964), (496, 42304), (512, 40982), (661, 31744), (992, 21152), (1024, 20491), (1322, 15872), (1984, 10576), (2644, 7936), (3968, 5288)]