18909385

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{89}}^1\times {\mathrm{3863}}^1$

素因数の和:3968

約数の個数: 16

約数和(自身を含む): 25038720

約数和(自身を除く): 6129335

約数列:

[1, 5, 11, 55, 89, 445, 979, 3863, 4895, 19315, 42493, 212465, 343807, 1719035, 3781877, 18909385]

約数ペア:

[(1, 18909385), (5, 3781877), (11, 1719035), (55, 343807), (89, 212465), (445, 42493), (979, 19315), (3863, 4895)]