217129521

素因数分解:

$3^1\times 7^1\times {\mathrm{73}}^1\times {\mathrm{141637}}^1$

素因数の和:141720

約数の個数: 16

約数和(自身を含む): 335398784

約数和(自身を除く): 118269263

約数列:

[1, 3, 7, 21, 73, 219, 511, 1533, 141637, 424911, 991459, 2974377, 10339501, 31018503, 72376507, 217129521]

約数ペア:

[(1, 217129521), (3, 72376507), (7, 31018503), (21, 10339501), (73, 2974377), (219, 991459), (511, 424911), (1533, 141637)]