21512617

素因数分解:

$7^3\times {\mathrm{19}}^1\times {\mathrm{3301}}^1$

素因数の和:3341

約数の個数: 16

約数和(自身を含む): 26416000

約数和(自身を除く): 4903383

約数列:

[1, 7, 19, 49, 133, 343, 931, 3301, 6517, 23107, 62719, 161749, 439033, 1132243, 3073231, 21512617]

約数ペア:

[(1, 21512617), (7, 3073231), (19, 1132243), (49, 439033), (133, 161749), (343, 62719), (931, 23107), (3301, 6517)]