20265388

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{499}}^1$

素因数の和:598

約数の個数: 48

約数和(自身を含む): 42336000

約数和(自身を除く): 22070612

約数列:

[1, 2, 4, 11, 13, 22, 26, 44, 52, 71, 142, 143, 284, 286, 499, 572, 781, 923, 998, 1562, 1846, 1996, 3124, 3692, 5489, 6487, 10153, 10978, 12974, 20306, 21956, 25948, 35429, 40612, 70858, 71357, 141716, 142714, 285428, 389719, 460577, 779438, 921154, 1558876, 1842308, 5066347, 10132694, 20265388]

約数ペア:

[(1, 20265388), (2, 10132694), (4, 5066347), (11, 1842308), (13, 1558876), (22, 921154), (26, 779438), (44, 460577), (52, 389719), (71, 285428), (142, 142714), (143, 141716), (284, 71357), (286, 70858), (499, 40612), (572, 35429), (781, 25948), (923, 21956), (998, 20306), (1562, 12974), (1846, 10978), (1996, 10153), (3124, 6487), (3692, 5489)]