20859993

素因数分解:

$3^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{971}}^1$

素因数の和:1026

約数の個数: 48

約数和(自身を含む): 38817792

約数和(自身を除く): 17957799

約数列:

[1, 3, 7, 9, 11, 21, 31, 33, 63, 77, 93, 99, 217, 231, 279, 341, 651, 693, 971, 1023, 1953, 2387, 2913, 3069, 6797, 7161, 8739, 10681, 20391, 21483, 30101, 32043, 61173, 74767, 90303, 96129, 210707, 224301, 270909, 331111, 632121, 672903, 993333, 1896363, 2317777, 2979999, 6953331, 20859993]

約数ペア:

[(1, 20859993), (3, 6953331), (7, 2979999), (9, 2317777), (11, 1896363), (21, 993333), (31, 672903), (33, 632121), (63, 331111), (77, 270909), (93, 224301), (99, 210707), (217, 96129), (231, 90303), (279, 74767), (341, 61173), (651, 32043), (693, 30101), (971, 21483), (1023, 20391), (1953, 10681), (2387, 8739), (2913, 7161), (3069, 6797)]