21507795

素因数分解:

$3^3\times 5^1\times {\mathrm{313}}^1\times {\mathrm{509}}^1$

素因数の和:836

約数の個数: 32

約数和(自身を含む): 38433600

約数和(自身を除く): 16925805

約数列:

[1, 3, 5, 9, 15, 27, 45, 135, 313, 509, 939, 1527, 1565, 2545, 2817, 4581, 4695, 7635, 8451, 13743, 14085, 22905, 42255, 68715, 159317, 477951, 796585, 1433853, 2389755, 4301559, 7169265, 21507795]

約数ペア:

[(1, 21507795), (3, 7169265), (5, 4301559), (9, 2389755), (15, 1433853), (27, 796585), (45, 477951), (135, 159317), (313, 68715), (509, 42255), (939, 22905), (1527, 14085), (1565, 13743), (2545, 8451), (2817, 7635), (4581, 4695)]