21240135

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{67429}}^1$

素因数の和:67447

約数の個数: 24

約数和(自身を含む): 42076320

約数和(自身を除く): 20836185

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 63, 105, 315, 67429, 202287, 337145, 472003, 606861, 1011435, 1416009, 2360015, 3034305, 4248027, 7080045, 21240135]

約数ペア:

[(1, 21240135), (3, 7080045), (5, 4248027), (7, 3034305), (9, 2360015), (15, 1416009), (21, 1011435), (35, 606861), (45, 472003), (63, 337145), (105, 202287), (315, 67429)]