20405880

素因数分解:

$2^3\times 3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{5153}}^1$

素因数の和:5181

約数の個数: 96

約数和(自身を含む): 72362160

約数和(自身を除く): 51956280

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 11, 12, 15, 18, 20, 22, 24, 30, 33, 36, 40, 44, 45, 55, 60, 66, 72, 88, 90, 99, 110, 120, 132, 165, 180, 198, 220, 264, 330, 360, 396, 440, 495, 660, 792, 990, 1320, 1980, 3960, 5153, 10306, 15459, 20612, 25765, 30918, 41224, 46377, 51530, 56683, 61836, 77295, 92754, 103060, 113366, 123672, 154590, 170049, 185508, 206120, 226732, 231885, 283415, 309180, 340098, 371016, 453464, 463770, 510147, 566830, 618360, 680196, 850245, 927540, 1020294, 1133660, 1360392, 1700490, 1855080, 2040588, 2267320, 2550735, 3400980, 4081176, 5101470, 6801960, 10202940, 20405880]

約数ペア:

[(1, 20405880), (2, 10202940), (3, 6801960), (4, 5101470), (5, 4081176), (6, 3400980), (8, 2550735), (9, 2267320), (10, 2040588), (11, 1855080), (12, 1700490), (15, 1360392), (18, 1133660), (20, 1020294), (22, 927540), (24, 850245), (30, 680196), (33, 618360), (36, 566830), (40, 510147), (44, 463770), (45, 453464), (55, 371016), (60, 340098), (66, 309180), (72, 283415), (88, 231885), (90, 226732), (99, 206120), (110, 185508), (120, 170049), (132, 154590), (165, 123672), (180, 113366), (198, 103060), (220, 92754), (264, 77295), (330, 61836), (360, 56683), (396, 51530), (440, 46377), (495, 41224), (660, 30918), (792, 25765), (990, 20612), (1320, 15459), (1980, 10306), (3960, 5153)]