20001520

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{191}}^1$

素因数の和:239

約数の個数: 160

約数和(自身を含む): 61710336

約数和(自身を除く): 41708816

約数列:

[1, 2, 4, 5, 7, 8, 10, 11, 14, 16, 17, 20, 22, 28, 34, 35, 40, 44, 55, 56, 68, 70, 77, 80, 85, 88, 110, 112, 119, 136, 140, 154, 170, 176, 187, 191, 220, 238, 272, 280, 308, 340, 374, 382, 385, 440, 476, 560, 595, 616, 680, 748, 764, 770, 880, 935, 952, 955, 1190, 1232, 1309, 1337, 1360, 1496, 1528, 1540, 1870, 1904, 1910, 2101, 2380, 2618, 2674, 2992, 3056, 3080, 3247, 3740, 3820, 4202, 4760, 5236, 5348, 6160, 6494, 6545, 6685, 7480, 7640, 8404, 9520, 10472, 10505, 10696, 12988, 13090, 13370, 14707, 14960, 15280, 16235, 16808, 20944, 21010, 21392, 22729, 25976, 26180, 26740, 29414, 32470, 33616, 35717, 42020, 45458, 51952, 52360, 53480, 58828, 64940, 71434, 73535, 84040, 90916, 104720, 106960, 113645, 117656, 129880, 142868, 147070, 168080, 178585, 181832, 227290, 235312, 250019, 259760, 285736, 294140, 357170, 363664, 454580, 500038, 571472, 588280, 714340, 909160, 1000076, 1176560, 1250095, 1428680, 1818320, 2000152, 2500190, 2857360, 4000304, 5000380, 10000760, 20001520]

約数ペア:

[(1, 20001520), (2, 10000760), (4, 5000380), (5, 4000304), (7, 2857360), (8, 2500190), (10, 2000152), (11, 1818320), (14, 1428680), (16, 1250095), (17, 1176560), (20, 1000076), (22, 909160), (28, 714340), (34, 588280), (35, 571472), (40, 500038), (44, 454580), (55, 363664), (56, 357170), (68, 294140), (70, 285736), (77, 259760), (80, 250019), (85, 235312), (88, 227290), (110, 181832), (112, 178585), (119, 168080), (136, 147070), (140, 142868), (154, 129880), (170, 117656), (176, 113645), (187, 106960), (191, 104720), (220, 90916), (238, 84040), (272, 73535), (280, 71434), (308, 64940), (340, 58828), (374, 53480), (382, 52360), (385, 51952), (440, 45458), (476, 42020), (560, 35717), (595, 33616), (616, 32470), (680, 29414), (748, 26740), (764, 26180), (770, 25976), (880, 22729), (935, 21392), (952, 21010), (955, 20944), (1190, 16808), (1232, 16235), (1309, 15280), (1337, 14960), (1360, 14707), (1496, 13370), (1528, 13090), (1540, 12988), (1870, 10696), (1904, 10505), (1910, 10472), (2101, 9520), (2380, 8404), (2618, 7640), (2674, 7480), (2992, 6685), (3056, 6545), (3080, 6494), (3247, 6160), (3740, 5348), (3820, 5236), (4202, 4760)]