78788080

素因数分解:

$2^4\times 5^1\times 7^2\times {\mathrm{101}}^1\times {\mathrm{199}}^1$

素因数の和:327

約数の個数: 120

約数和(自身を含む): 216280800

約数和(自身を除く): 137492720

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 49, 56, 70, 80, 98, 101, 112, 140, 196, 199, 202, 245, 280, 392, 398, 404, 490, 505, 560, 707, 784, 796, 808, 980, 995, 1010, 1393, 1414, 1592, 1616, 1960, 1990, 2020, 2786, 2828, 3184, 3535, 3920, 3980, 4040, 4949, 5572, 5656, 6965, 7070, 7960, 8080, 9751, 9898, 11144, 11312, 13930, 14140, 15920, 19502, 19796, 20099, 22288, 24745, 27860, 28280, 39004, 39592, 40198, 48755, 49490, 55720, 56560, 78008, 79184, 80396, 97510, 98980, 100495, 111440, 140693, 156016, 160792, 195020, 197960, 200990, 281386, 321584, 390040, 395920, 401980, 562772, 703465, 780080, 803960, 984851, 1125544, 1406930, 1607920, 1969702, 2251088, 2813860, 3939404, 4924255, 5627720, 7878808, 9848510, 11255440, 15757616, 19697020, 39394040, 78788080]

約数ペア:

[(1, 78788080), (2, 39394040), (4, 19697020), (5, 15757616), (7, 11255440), (8, 9848510), (10, 7878808), (14, 5627720), (16, 4924255), (20, 3939404), (28, 2813860), (35, 2251088), (40, 1969702), (49, 1607920), (56, 1406930), (70, 1125544), (80, 984851), (98, 803960), (101, 780080), (112, 703465), (140, 562772), (196, 401980), (199, 395920), (202, 390040), (245, 321584), (280, 281386), (392, 200990), (398, 197960), (404, 195020), (490, 160792), (505, 156016), (560, 140693), (707, 111440), (784, 100495), (796, 98980), (808, 97510), (980, 80396), (995, 79184), (1010, 78008), (1393, 56560), (1414, 55720), (1592, 49490), (1616, 48755), (1960, 40198), (1990, 39592), (2020, 39004), (2786, 28280), (2828, 27860), (3184, 24745), (3535, 22288), (3920, 20099), (3980, 19796), (4040, 19502), (4949, 15920), (5572, 14140), (5656, 13930), (6965, 11312), (7070, 11144), (7960, 9898), (8080, 9751)]