20945875

素因数分解:

$5^3\times {\mathrm{41}}^1\times {\mathrm{61}}^1\times {\mathrm{67}}^1$

素因数の和:184

約数の個数: 32

約数和(自身を含む): 27623232

約数和(自身を除く): 6677357

約数列:

[1, 5, 25, 41, 61, 67, 125, 205, 305, 335, 1025, 1525, 1675, 2501, 2747, 4087, 5125, 7625, 8375, 12505, 13735, 20435, 62525, 68675, 102175, 167567, 312625, 343375, 510875, 837835, 4189175, 20945875]

約数ペア:

[(1, 20945875), (5, 4189175), (25, 837835), (41, 510875), (61, 343375), (67, 312625), (125, 167567), (205, 102175), (305, 68675), (335, 62525), (1025, 20435), (1525, 13735), (1675, 12505), (2501, 8375), (2747, 7625), (4087, 5125)]