19709955

素因数分解:

$3^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{71}}^1\times {\mathrm{199}}^1$

素因数の和:312

約数の個数: 48

約数和(自身を含む): 35942400

約数和(自身を除く): 16232445

約数列:

[1, 3, 5, 9, 15, 31, 45, 71, 93, 155, 199, 213, 279, 355, 465, 597, 639, 995, 1065, 1395, 1791, 2201, 2985, 3195, 6169, 6603, 8955, 11005, 14129, 18507, 19809, 30845, 33015, 42387, 55521, 70645, 92535, 99045, 127161, 211935, 277605, 437999, 635805, 1313997, 2189995, 3941991, 6569985, 19709955]

約数ペア:

[(1, 19709955), (3, 6569985), (5, 3941991), (9, 2189995), (15, 1313997), (31, 635805), (45, 437999), (71, 277605), (93, 211935), (155, 127161), (199, 99045), (213, 92535), (279, 70645), (355, 55521), (465, 42387), (597, 33015), (639, 30845), (995, 19809), (1065, 18507), (1395, 14129), (1791, 11005), (2201, 8955), (2985, 6603), (3195, 6169)]