21256885

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{19237}}^1$

素因数の和:19272

約数の個数: 16

約数和(自身を含む): 29087856

約数和(自身を除く): 7830971

約数列:

[1, 5, 13, 17, 65, 85, 221, 1105, 19237, 96185, 250081, 327029, 1250405, 1635145, 4251377, 21256885]

約数ペア:

[(1, 21256885), (5, 4251377), (13, 1635145), (17, 1250405), (65, 327029), (85, 250081), (221, 96185), (1105, 19237)]