81294780

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{193559}}^1$

素因数の和:193578

約数の個数: 48

約数和(自身を含む): 260144640

約数和(自身を除く): 178849860

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 420, 193559, 387118, 580677, 774236, 967795, 1161354, 1354913, 1935590, 2322708, 2709826, 2903385, 3871180, 4064739, 5419652, 5806770, 6774565, 8129478, 11613540, 13549130, 16258956, 20323695, 27098260, 40647390, 81294780]

約数ペア:

[(1, 81294780), (2, 40647390), (3, 27098260), (4, 20323695), (5, 16258956), (6, 13549130), (7, 11613540), (10, 8129478), (12, 6774565), (14, 5806770), (15, 5419652), (20, 4064739), (21, 3871180), (28, 2903385), (30, 2709826), (35, 2322708), (42, 1935590), (60, 1354913), (70, 1161354), (84, 967795), (105, 774236), (140, 580677), (210, 387118), (420, 193559)]