25001221

素因数分解:

$7^2\times {\mathrm{31}}^1\times {\mathrm{109}}^1\times {\mathrm{151}}^1$

素因数の和:305

約数の個数: 24

約数和(自身を含む): 30497280

約数和(自身を除く): 5496059

約数列:

[1, 7, 31, 49, 109, 151, 217, 763, 1057, 1519, 3379, 4681, 5341, 7399, 16459, 23653, 32767, 115213, 165571, 229369, 510229, 806491, 3571603, 25001221]

約数ペア:

[(1, 25001221), (7, 3571603), (31, 806491), (49, 510229), (109, 229369), (151, 165571), (217, 115213), (763, 32767), (1057, 23653), (1519, 16459), (3379, 7399), (4681, 5341)]