21139792

素因数分解:

$2^4\times {\mathrm{53}}^1\times {\mathrm{97}}^1\times {\mathrm{257}}^1$

素因数の和:415

約数の個数: 40

約数和(自身を含む): 42325416

約数和(自身を除く): 21185624

約数列:

[1, 2, 4, 8, 16, 53, 97, 106, 194, 212, 257, 388, 424, 514, 776, 848, 1028, 1552, 2056, 4112, 5141, 10282, 13621, 20564, 24929, 27242, 41128, 49858, 54484, 82256, 99716, 108968, 199432, 217936, 398864, 1321237, 2642474, 5284948, 10569896, 21139792]

約数ペア:

[(1, 21139792), (2, 10569896), (4, 5284948), (8, 2642474), (16, 1321237), (53, 398864), (97, 217936), (106, 199432), (194, 108968), (212, 99716), (257, 82256), (388, 54484), (424, 49858), (514, 41128), (776, 27242), (848, 24929), (1028, 20564), (1552, 13621), (2056, 10282), (4112, 5141)]