21102895

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{8923}}^1$

素因数の和:8982

約数の個数: 16

約数和(自身を含む): 28271232

約数和(自身を除く): 7168337

約数列:

[1, 5, 11, 43, 55, 215, 473, 2365, 8923, 44615, 98153, 383689, 490765, 1918445, 4220579, 21102895]

約数ペア:

[(1, 21102895), (5, 4220579), (11, 1918445), (43, 490765), (55, 383689), (215, 98153), (473, 44615), (2365, 8923)]