21396885

素因数分解:

$3^1\times 5^1\times {\mathrm{131}}^1\times {\mathrm{10889}}^1$

素因数の和:11028

約数の個数: 16

約数和(自身を含む): 34499520

約数和(自身を除く): 13102635

約数列:

[1, 3, 5, 15, 131, 393, 655, 1965, 10889, 32667, 54445, 163335, 1426459, 4279377, 7132295, 21396885]

約数ペア:

[(1, 21396885), (3, 7132295), (5, 4279377), (15, 1426459), (131, 163335), (393, 54445), (655, 32667), (1965, 10889)]