12320020

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^2\times {\mathrm{641}}^1$

素因数の和:712

約数の個数: 36

約数和(自身を含む): 26775252

約数和(自身を除く): 14455232

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 310, 620, 641, 961, 1282, 1922, 2564, 3205, 3844, 4805, 6410, 9610, 12820, 19220, 19871, 39742, 79484, 99355, 198710, 397420, 616001, 1232002, 2464004, 3080005, 6160010, 12320020]

約数ペア:

[(1, 12320020), (2, 6160010), (4, 3080005), (5, 2464004), (10, 1232002), (20, 616001), (31, 397420), (62, 198710), (124, 99355), (155, 79484), (310, 39742), (620, 19871), (641, 19220), (961, 12820), (1282, 9610), (1922, 6410), (2564, 4805), (3205, 3844)]