20997185

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{283}}^1$

素因数の和:389

約数の個数: 32

約数和(自身を含む): 29445120

約数和(自身を除く): 8447935

約数列:

[1, 5, 11, 19, 55, 71, 95, 209, 283, 355, 781, 1045, 1349, 1415, 3113, 3905, 5377, 6745, 14839, 15565, 20093, 26885, 59147, 74195, 100465, 221023, 295735, 381767, 1105115, 1908835, 4199437, 20997185]

約数ペア:

[(1, 20997185), (5, 4199437), (11, 1908835), (19, 1105115), (55, 381767), (71, 295735), (95, 221023), (209, 100465), (283, 74195), (355, 59147), (781, 26885), (1045, 20093), (1349, 15565), (1415, 14839), (3113, 6745), (3905, 5377)]