21840345

素因数分解:

$3^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{11287}}^1$

素因数の和:11341

約数の個数: 24

約数和(自身を含む): 38740416

約数和(自身を除く): 16900071

約数列:

[1, 3, 5, 9, 15, 43, 45, 129, 215, 387, 645, 1935, 11287, 33861, 56435, 101583, 169305, 485341, 507915, 1456023, 2426705, 4368069, 7280115, 21840345]

約数ペア:

[(1, 21840345), (3, 7280115), (5, 4368069), (9, 2426705), (15, 1456023), (43, 507915), (45, 485341), (129, 169305), (215, 101583), (387, 56435), (645, 33861), (1935, 11287)]