21980826

素因数分解:

$2^1\times 3^2\times 7^1\times {\mathrm{43}}^1\times {\mathrm{4057}}^1$

素因数の和:4115

約数の個数: 48

約数和(自身を含む): 55708224

約数和(自身を除く): 33727398

約数列:

[1, 2, 3, 6, 7, 9, 14, 18, 21, 42, 43, 63, 86, 126, 129, 258, 301, 387, 602, 774, 903, 1806, 2709, 4057, 5418, 8114, 12171, 24342, 28399, 36513, 56798, 73026, 85197, 170394, 174451, 255591, 348902, 511182, 523353, 1046706, 1221157, 1570059, 2442314, 3140118, 3663471, 7326942, 10990413, 21980826]

約数ペア:

[(1, 21980826), (2, 10990413), (3, 7326942), (6, 3663471), (7, 3140118), (9, 2442314), (14, 1570059), (18, 1221157), (21, 1046706), (42, 523353), (43, 511182), (63, 348902), (86, 255591), (126, 174451), (129, 170394), (258, 85197), (301, 73026), (387, 56798), (602, 36513), (774, 28399), (903, 24342), (1806, 12171), (2709, 8114), (4057, 5418)]