21058125

素因数分解:

$3^1\times 5^4\times {\mathrm{11}}^1\times {\mathrm{1021}}^1$

素因数の和:1055

約数の個数: 40

約数和(自身を含む): 38312736

約数和(自身を除く): 17254611

約数列:

[1, 3, 5, 11, 15, 25, 33, 55, 75, 125, 165, 275, 375, 625, 825, 1021, 1375, 1875, 3063, 4125, 5105, 6875, 11231, 15315, 20625, 25525, 33693, 56155, 76575, 127625, 168465, 280775, 382875, 638125, 842325, 1403875, 1914375, 4211625, 7019375, 21058125]

約数ペア:

[(1, 21058125), (3, 7019375), (5, 4211625), (11, 1914375), (15, 1403875), (25, 842325), (33, 638125), (55, 382875), (75, 280775), (125, 168465), (165, 127625), (275, 76575), (375, 56155), (625, 33693), (825, 25525), (1021, 20625), (1375, 15315), (1875, 11231), (3063, 6875), (4125, 5105)]