21506615

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{19463}}^1$

素因数の和:19498

約数の個数: 16

約数和(自身を含む): 29429568

約数和(自身を除く): 7922953

約数列:

[1, 5, 13, 17, 65, 85, 221, 1105, 19463, 97315, 253019, 330871, 1265095, 1654355, 4301323, 21506615]

約数ペア:

[(1, 21506615), (5, 4301323), (13, 1654355), (17, 1265095), (65, 330871), (85, 253019), (221, 97315), (1105, 19463)]