21285215

素因数分解:

$5^1\times 7^1\times {\mathrm{43}}^1\times {\mathrm{14143}}^1$

素因数の和:14198

約数の個数: 16

約数和(自身を含む): 29872128

約数和(自身を除く): 8586913

約数列:

[1, 5, 7, 35, 43, 215, 301, 1505, 14143, 70715, 99001, 495005, 608149, 3040745, 4257043, 21285215]

約数ペア:

[(1, 21285215), (5, 4257043), (7, 3040745), (35, 608149), (43, 495005), (215, 99001), (301, 70715), (1505, 14143)]