21146385

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{6379}}^1$

素因数の和:6417

約数の個数: 32

約数和(自身を含む): 38586240

約数和(自身を除く): 17439855

約数列:

[1, 3, 5, 13, 15, 17, 39, 51, 65, 85, 195, 221, 255, 663, 1105, 3315, 6379, 19137, 31895, 82927, 95685, 108443, 248781, 325329, 414635, 542215, 1243905, 1409759, 1626645, 4229277, 7048795, 21146385]

約数ペア:

[(1, 21146385), (3, 7048795), (5, 4229277), (13, 1626645), (15, 1409759), (17, 1243905), (39, 542215), (51, 414635), (65, 325329), (85, 248781), (195, 108443), (221, 95685), (255, 82927), (663, 31895), (1105, 19137), (3315, 6379)]