21030815

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{17029}}^1$

素因数の和:17066

約数の個数: 16

約数和(自身を含む): 28610400

約数和(自身を除く): 7579585

約数列:

[1, 5, 13, 19, 65, 95, 247, 1235, 17029, 85145, 221377, 323551, 1106885, 1617755, 4206163, 21030815]

約数ペア:

[(1, 21030815), (5, 4206163), (13, 1617755), (19, 1106885), (65, 323551), (95, 221377), (247, 85145), (1235, 17029)]