2009000020

素因数分解:

$2^2\times 5^1\times {\mathrm{79}}^1\times {\mathrm{283}}^1\times {\mathrm{4493}}^1$

素因数の和:4864

約数の個数: 48

約数和(自身を含む): 4288354560

約数和(自身を除く): 2279354540

約数列:

[1, 2, 4, 5, 10, 20, 79, 158, 283, 316, 395, 566, 790, 1132, 1415, 1580, 2830, 4493, 5660, 8986, 17972, 22357, 22465, 44714, 44930, 89428, 89860, 111785, 223570, 354947, 447140, 709894, 1271519, 1419788, 1774735, 2543038, 3549470, 5086076, 6357595, 7098940, 12715190, 25430380, 100450001, 200900002, 401800004, 502250005, 1004500010, 2009000020]

約数ペア:

[(1, 2009000020), (2, 1004500010), (4, 502250005), (5, 401800004), (10, 200900002), (20, 100450001), (79, 25430380), (158, 12715190), (283, 7098940), (316, 6357595), (395, 5086076), (566, 3549470), (790, 2543038), (1132, 1774735), (1415, 1419788), (1580, 1271519), (2830, 709894), (4493, 447140), (5660, 354947), (8986, 223570), (17972, 111785), (22357, 89860), (22465, 89428), (44714, 44930)]