21267715

素因数分解:

$5^1\times 7^3\times {\mathrm{12401}}^1$

素因数の和:12427

約数の個数: 16

約数和(自身を含む): 29764800

約数和(自身を除く): 8497085

約数列:

[1, 5, 7, 35, 49, 245, 343, 1715, 12401, 62005, 86807, 434035, 607649, 3038245, 4253543, 21267715]

約数ペア:

[(1, 21267715), (5, 4253543), (7, 3038245), (35, 607649), (49, 434035), (245, 86807), (343, 62005), (1715, 12401)]