20384739

素因数分解:

$3^2\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{71}}^1\times {\mathrm{73}}^1$

素因数の和:192

約数の個数: 48

約数和(自身を含む): 33246720

約数和(自身を除く): 12861981

約数列:

[1, 3, 9, 19, 23, 57, 69, 71, 73, 171, 207, 213, 219, 437, 639, 657, 1311, 1349, 1387, 1633, 1679, 3933, 4047, 4161, 4899, 5037, 5183, 12141, 12483, 14697, 15111, 15549, 31027, 31901, 46647, 93081, 95703, 98477, 119209, 279243, 287109, 295431, 357627, 886293, 1072881, 2264971, 6794913, 20384739]

約数ペア:

[(1, 20384739), (3, 6794913), (9, 2264971), (19, 1072881), (23, 886293), (57, 357627), (69, 295431), (71, 287109), (73, 279243), (171, 119209), (207, 98477), (213, 95703), (219, 93081), (437, 46647), (639, 31901), (657, 31027), (1311, 15549), (1349, 15111), (1387, 14697), (1633, 12483), (1679, 12141), (3933, 5183), (4047, 5037), (4161, 4899)]