21185395

素因数分解:

$5^1\times 7^3\times {\mathrm{11}}^1\times {\mathrm{1123}}^1$

素因数の和:1160

約数の個数: 32

約数和(自身を含む): 32371200

約数和(自身を除く): 11185805

約数列:

[1, 5, 7, 11, 35, 49, 55, 77, 245, 343, 385, 539, 1123, 1715, 2695, 3773, 5615, 7861, 12353, 18865, 39305, 55027, 61765, 86471, 275135, 385189, 432355, 605297, 1925945, 3026485, 4237079, 21185395]

約数ペア:

[(1, 21185395), (5, 4237079), (7, 3026485), (11, 1925945), (35, 605297), (49, 432355), (55, 385189), (77, 275135), (245, 86471), (343, 61765), (385, 55027), (539, 39305), (1123, 18865), (1715, 12353), (2695, 7861), (3773, 5615)]