21410389

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{73}}^1\times {\mathrm{293}}^1$

素因数の和:397

約数の個数: 32

約数和(自身を含む): 29240064

約数和(自身を除く): 7829675

約数列:

[1, 7, 11, 13, 73, 77, 91, 143, 293, 511, 803, 949, 1001, 2051, 3223, 3809, 5621, 6643, 10439, 21389, 22561, 26663, 41899, 73073, 149723, 235279, 278057, 293293, 1646953, 1946399, 3058627, 21410389]

約数ペア:

[(1, 21410389), (7, 3058627), (11, 1946399), (13, 1646953), (73, 293293), (77, 278057), (91, 235279), (143, 149723), (293, 73073), (511, 41899), (803, 26663), (949, 22561), (1001, 21389), (2051, 10439), (3223, 6643), (3809, 5621)]