20857617

素因数分解:

$3^2\times {\mathrm{11}}^2\times {\mathrm{107}}^1\times {\mathrm{179}}^1$

素因数の和:314

約数の個数: 36

約数和(自身を含む): 33611760

約数和(自身を除く): 12754143

約数列:

[1, 3, 9, 11, 33, 99, 107, 121, 179, 321, 363, 537, 963, 1089, 1177, 1611, 1969, 3531, 5907, 10593, 12947, 17721, 19153, 21659, 38841, 57459, 64977, 116523, 172377, 194931, 210683, 632049, 1896147, 2317513, 6952539, 20857617]

約数ペア:

[(1, 20857617), (3, 6952539), (9, 2317513), (11, 1896147), (33, 632049), (99, 210683), (107, 194931), (121, 172377), (179, 116523), (321, 64977), (363, 57459), (537, 38841), (963, 21659), (1089, 19153), (1177, 17721), (1611, 12947), (1969, 10593), (3531, 5907)]