21604781

素因数分解:

${\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{109}}^1\times {\mathrm{487}}^1$

素因数の和:644

約数の個数: 16

約数和(自身を含む): 24478080

約数和(自身を除く): 2873299

約数列:

[1, 11, 37, 109, 407, 487, 1199, 4033, 5357, 18019, 44363, 53083, 198209, 583913, 1964071, 21604781]

約数ペア:

[(1, 21604781), (11, 1964071), (37, 583913), (109, 198209), (407, 53083), (487, 44363), (1199, 18019), (4033, 5357)]