20512946480

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{101}}^1\times {\mathrm{401}}^1\times {\mathrm{487}}^1$

素因数の和:1015

約数の個数: 160

約数和(自身を含む): 52105915008

約数和(自身を除く): 31592968528

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 101, 104, 130, 202, 208, 260, 401, 404, 487, 505, 520, 802, 808, 974, 1010, 1040, 1313, 1604, 1616, 1948, 2005, 2020, 2435, 2626, 3208, 3896, 4010, 4040, 4870, 5213, 5252, 6331, 6416, 6565, 7792, 8020, 8080, 9740, 10426, 10504, 12662, 13130, 16040, 19480, 20852, 21008, 25324, 26065, 26260, 31655, 32080, 38960, 40501, 41704, 49187, 50648, 52130, 52520, 63310, 81002, 83408, 98374, 101296, 104260, 105040, 126620, 162004, 195287, 196748, 202505, 208520, 245935, 253240, 324008, 390574, 393496, 405010, 417040, 491870, 506480, 526513, 639431, 648016, 781148, 786992, 810020, 976435, 983740, 1053026, 1278862, 1562296, 1620040, 1952870, 1967480, 2106052, 2538731, 2557724, 2632565, 3124592, 3197155, 3240080, 3905740, 3934960, 4212104, 5077462, 5115448, 5265130, 6394310, 7811480, 8424208, 10154924, 10230896, 10530260, 12693655, 12788620, 15622960, 19723987, 20309848, 21060520, 25387310, 25577240, 39447974, 40619696, 42121040, 50774620, 51154480, 78895948, 98619935, 101549240, 157791896, 197239870, 203098480, 256411831, 315583792, 394479740, 512823662, 788959480, 1025647324, 1282059155, 1577918960, 2051294648, 2564118310, 4102589296, 5128236620, 10256473240, 20512946480]

約数ペア:

[(1, 20512946480), (2, 10256473240), (4, 5128236620), (5, 4102589296), (8, 2564118310), (10, 2051294648), (13, 1577918960), (16, 1282059155), (20, 1025647324), (26, 788959480), (40, 512823662), (52, 394479740), (65, 315583792), (80, 256411831), (101, 203098480), (104, 197239870), (130, 157791896), (202, 101549240), (208, 98619935), (260, 78895948), (401, 51154480), (404, 50774620), (487, 42121040), (505, 40619696), (520, 39447974), (802, 25577240), (808, 25387310), (974, 21060520), (1010, 20309848), (1040, 19723987), (1313, 15622960), (1604, 12788620), (1616, 12693655), (1948, 10530260), (2005, 10230896), (2020, 10154924), (2435, 8424208), (2626, 7811480), (3208, 6394310), (3896, 5265130), (4010, 5115448), (4040, 5077462), (4870, 4212104), (5213, 3934960), (5252, 3905740), (6331, 3240080), (6416, 3197155), (6565, 3124592), (7792, 2632565), (8020, 2557724), (8080, 2538731), (9740, 2106052), (10426, 1967480), (10504, 1952870), (12662, 1620040), (13130, 1562296), (16040, 1278862), (19480, 1053026), (20852, 983740), (21008, 976435), (25324, 810020), (26065, 786992), (26260, 781148), (31655, 648016), (32080, 639431), (38960, 526513), (40501, 506480), (41704, 491870), (49187, 417040), (50648, 405010), (52130, 393496), (52520, 390574), (63310, 324008), (81002, 253240), (83408, 245935), (98374, 208520), (101296, 202505), (104260, 196748), (105040, 195287), (126620, 162004)]