21000916517

素因数分解:

$7^2\times {\mathrm{47}}^1\times {\mathrm{1307}}^1\times {\mathrm{6977}}^1$

素因数の和:8345

約数の個数: 24

約数和(自身を含む): 24972084864

約数和(自身を除く): 3971168347

約数列:

[1, 7, 47, 49, 329, 1307, 2303, 6977, 9149, 48839, 61429, 64043, 327919, 341873, 430003, 2295433, 3010021, 9118939, 16068031, 63832573, 428590133, 446828011, 3000130931, 21000916517]

約数ペア:

[(1, 21000916517), (7, 3000130931), (47, 446828011), (49, 428590133), (329, 63832573), (1307, 16068031), (2303, 9118939), (6977, 3010021), (9149, 2295433), (48839, 430003), (61429, 341873), (64043, 327919)]