21163568

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{1619}}^1$

素因数の和:1689

約数の個数: 40

約数和(自身を含む): 44193600

約数和(自身を除く): 23030032

約数列:

[1, 2, 4, 8, 16, 19, 38, 43, 76, 86, 152, 172, 304, 344, 688, 817, 1619, 1634, 3238, 3268, 6476, 6536, 12952, 13072, 25904, 30761, 61522, 69617, 123044, 139234, 246088, 278468, 492176, 556936, 1113872, 1322723, 2645446, 5290892, 10581784, 21163568]

約数ペア:

[(1, 21163568), (2, 10581784), (4, 5290892), (8, 2645446), (16, 1322723), (19, 1113872), (38, 556936), (43, 492176), (76, 278468), (86, 246088), (152, 139234), (172, 123044), (304, 69617), (344, 61522), (688, 30761), (817, 25904), (1619, 13072), (1634, 12952), (3238, 6536), (3268, 6476)]