20501776

素因数分解:

$2^4\times {\mathrm{47}}^1\times {\mathrm{137}}^1\times {\mathrm{199}}^1$

素因数の和:391

約数の個数: 40

約数和(自身を含む): 41068800

約数和(自身を除く): 20567024

約数列:

[1, 2, 4, 8, 16, 47, 94, 137, 188, 199, 274, 376, 398, 548, 752, 796, 1096, 1592, 2192, 3184, 6439, 9353, 12878, 18706, 25756, 27263, 37412, 51512, 54526, 74824, 103024, 109052, 149648, 218104, 436208, 1281361, 2562722, 5125444, 10250888, 20501776]

約数ペア:

[(1, 20501776), (2, 10250888), (4, 5125444), (8, 2562722), (16, 1281361), (47, 436208), (94, 218104), (137, 149648), (188, 109052), (199, 103024), (274, 74824), (376, 54526), (398, 51512), (548, 37412), (752, 27263), (796, 25756), (1096, 18706), (1592, 12878), (2192, 9353), (3184, 6439)]