20019272

素因数分解:

$2^3\times 7^1\times {\mathrm{13}}^1\times {\mathrm{107}}^1\times {\mathrm{257}}^1$

素因数の和:390

約数の個数: 64

約数和(自身を含む): 46811520

約数和(自身を除く): 26792248

約数列:

[1, 2, 4, 7, 8, 13, 14, 26, 28, 52, 56, 91, 104, 107, 182, 214, 257, 364, 428, 514, 728, 749, 856, 1028, 1391, 1498, 1799, 2056, 2782, 2996, 3341, 3598, 5564, 5992, 6682, 7196, 9737, 11128, 13364, 14392, 19474, 23387, 26728, 27499, 38948, 46774, 54998, 77896, 93548, 109996, 187096, 192493, 219992, 357487, 384986, 714974, 769972, 1429948, 1539944, 2502409, 2859896, 5004818, 10009636, 20019272]

約数ペア:

[(1, 20019272), (2, 10009636), (4, 5004818), (7, 2859896), (8, 2502409), (13, 1539944), (14, 1429948), (26, 769972), (28, 714974), (52, 384986), (56, 357487), (91, 219992), (104, 192493), (107, 187096), (182, 109996), (214, 93548), (257, 77896), (364, 54998), (428, 46774), (514, 38948), (728, 27499), (749, 26728), (856, 23387), (1028, 19474), (1391, 14392), (1498, 13364), (1799, 11128), (2056, 9737), (2782, 7196), (2996, 6682), (3341, 5992), (3598, 5564)]