20816348

素因数分解:

$2^2\times 7^1\times {\mathrm{37}}^1\times {\mathrm{71}}^1\times {\mathrm{283}}^1$

素因数の和:402

約数の個数: 48

約数和(自身を含む): 43513344

約数和(自身を除く): 22696996

約数列:

[1, 2, 4, 7, 14, 28, 37, 71, 74, 142, 148, 259, 283, 284, 497, 518, 566, 994, 1036, 1132, 1981, 1988, 2627, 3962, 5254, 7924, 10471, 10508, 18389, 20093, 20942, 36778, 40186, 41884, 73297, 73556, 80372, 140651, 146594, 281302, 293188, 562604, 743441, 1486882, 2973764, 5204087, 10408174, 20816348]

約数ペア:

[(1, 20816348), (2, 10408174), (4, 5204087), (7, 2973764), (14, 1486882), (28, 743441), (37, 562604), (71, 293188), (74, 281302), (142, 146594), (148, 140651), (259, 80372), (283, 73556), (284, 73297), (497, 41884), (518, 40186), (566, 36778), (994, 20942), (1036, 20093), (1132, 18389), (1981, 10508), (1988, 10471), (2627, 7924), (3962, 5254)]