21022360

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{139}}^1\times {\mathrm{199}}^1$

素因数の和:368

約数の個数: 64

約数和(自身を含む): 50400000

約数和(自身を除く): 29377640

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 76, 95, 139, 152, 190, 199, 278, 380, 398, 556, 695, 760, 796, 995, 1112, 1390, 1592, 1990, 2641, 2780, 3781, 3980, 5282, 5560, 7562, 7960, 10564, 13205, 15124, 18905, 21128, 26410, 27661, 30248, 37810, 52820, 55322, 75620, 105640, 110644, 138305, 151240, 221288, 276610, 525559, 553220, 1051118, 1106440, 2102236, 2627795, 4204472, 5255590, 10511180, 21022360]

約数ペア:

[(1, 21022360), (2, 10511180), (4, 5255590), (5, 4204472), (8, 2627795), (10, 2102236), (19, 1106440), (20, 1051118), (38, 553220), (40, 525559), (76, 276610), (95, 221288), (139, 151240), (152, 138305), (190, 110644), (199, 105640), (278, 75620), (380, 55322), (398, 52820), (556, 37810), (695, 30248), (760, 27661), (796, 26410), (995, 21128), (1112, 18905), (1390, 15124), (1592, 13205), (1990, 10564), (2641, 7960), (2780, 7562), (3781, 5560), (3980, 5282)]