20851985

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{1321}}^1$

素因数の和:1385

約数の個数: 32

約数和(自身を含む): 31981824

約数和(自身を除く): 11129839

約数列:

[1, 5, 7, 11, 35, 41, 55, 77, 205, 287, 385, 451, 1321, 1435, 2255, 3157, 6605, 9247, 14531, 15785, 46235, 54161, 72655, 101717, 270805, 379127, 508585, 595771, 1895635, 2978855, 4170397, 20851985]

約数ペア:

[(1, 20851985), (5, 4170397), (7, 2978855), (11, 1895635), (35, 595771), (41, 508585), (55, 379127), (77, 270805), (205, 101717), (287, 72655), (385, 54161), (451, 46235), (1321, 15785), (1435, 14531), (2255, 9247), (3157, 6605)]