21105

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{67}}^1$

素因数の和:85

約数の個数: 24

約数和(自身を含む): 42432

約数和(自身を除く): 21327

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 63, 67, 105, 201, 315, 335, 469, 603, 1005, 1407, 2345, 3015, 4221, 7035, 21105]

約数ペア:

[(1, 21105), (3, 7035), (5, 4221), (7, 3015), (9, 2345), (15, 1407), (21, 1005), (35, 603), (45, 469), (63, 335), (67, 315), (105, 201)]