21540905

素因数分解:

$5^1\times {\mathrm{103}}^1\times {\mathrm{151}}^1\times {\mathrm{277}}^1$

素因数の和:536

約数の個数: 16

約数和(自身を含む): 26367744

約数和(自身を除く): 4826839

約数列:

[1, 5, 103, 151, 277, 515, 755, 1385, 15553, 28531, 41827, 77765, 142655, 209135, 4308181, 21540905]

約数ペア:

[(1, 21540905), (5, 4308181), (103, 209135), (151, 142655), (277, 77765), (515, 41827), (755, 28531), (1385, 15553)]