20742579

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{227}}^1$

素因数の和:328

約数の個数: 48

約数和(自身を含む): 35852544

約数和(自身を除く): 15109965

約数列:

[1, 3, 9, 11, 13, 33, 39, 71, 99, 117, 143, 213, 227, 429, 639, 681, 781, 923, 1287, 2043, 2343, 2497, 2769, 2951, 7029, 7491, 8307, 8853, 10153, 16117, 22473, 26559, 30459, 32461, 48351, 91377, 97383, 145053, 177287, 209521, 292149, 531861, 628563, 1595583, 1885689, 2304731, 6914193, 20742579]

約数ペア:

[(1, 20742579), (3, 6914193), (9, 2304731), (11, 1885689), (13, 1595583), (33, 628563), (39, 531861), (71, 292149), (99, 209521), (117, 177287), (143, 145053), (213, 97383), (227, 91377), (429, 48351), (639, 32461), (681, 30459), (781, 26559), (923, 22473), (1287, 16117), (2043, 10153), (2343, 8853), (2497, 8307), (2769, 7491), (2951, 7029)]