20713880

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{179}}^1\times {\mathrm{263}}^1$

素因数の和:464

約数の個数: 64

約数和(自身を含む): 51321600

約数和(自身を除く): 30607720

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 179, 220, 263, 358, 440, 526, 716, 895, 1052, 1315, 1432, 1790, 1969, 2104, 2630, 2893, 3580, 3938, 5260, 5786, 7160, 7876, 9845, 10520, 11572, 14465, 15752, 19690, 23144, 28930, 39380, 47077, 57860, 78760, 94154, 115720, 188308, 235385, 376616, 470770, 517847, 941540, 1035694, 1883080, 2071388, 2589235, 4142776, 5178470, 10356940, 20713880]

約数ペア:

[(1, 20713880), (2, 10356940), (4, 5178470), (5, 4142776), (8, 2589235), (10, 2071388), (11, 1883080), (20, 1035694), (22, 941540), (40, 517847), (44, 470770), (55, 376616), (88, 235385), (110, 188308), (179, 115720), (220, 94154), (263, 78760), (358, 57860), (440, 47077), (526, 39380), (716, 28930), (895, 23144), (1052, 19690), (1315, 15752), (1432, 14465), (1790, 11572), (1969, 10520), (2104, 9845), (2630, 7876), (2893, 7160), (3580, 5786), (3938, 5260)]