20881215

素因数分解:

$3^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{7607}}^1$

素因数の和:7679

約数の個数: 24

約数和(自身を含む): 36792288

約数和(自身を除く): 15911073

約数列:

[1, 3, 5, 9, 15, 45, 61, 183, 305, 549, 915, 2745, 7607, 22821, 38035, 68463, 114105, 342315, 464027, 1392081, 2320135, 4176243, 6960405, 20881215]

約数ペア:

[(1, 20881215), (3, 6960405), (5, 4176243), (9, 2320135), (15, 1392081), (45, 464027), (61, 342315), (183, 114105), (305, 68463), (549, 38035), (915, 22821), (2745, 7607)]