20805390

素因数分解:

$2^1\times 3^3\times 5^1\times {\mathrm{251}}^1\times {\mathrm{307}}^1$

素因数の和:574

約数の個数: 64

約数和(自身を含む): 55883520

約数和(自身を除く): 35078130

約数列:

[1, 2, 3, 5, 6, 9, 10, 15, 18, 27, 30, 45, 54, 90, 135, 251, 270, 307, 502, 614, 753, 921, 1255, 1506, 1535, 1842, 2259, 2510, 2763, 3070, 3765, 4518, 4605, 5526, 6777, 7530, 8289, 9210, 11295, 13554, 13815, 16578, 22590, 27630, 33885, 41445, 67770, 77057, 82890, 154114, 231171, 385285, 462342, 693513, 770570, 1155855, 1387026, 2080539, 2311710, 3467565, 4161078, 6935130, 10402695, 20805390]

約数ペア:

[(1, 20805390), (2, 10402695), (3, 6935130), (5, 4161078), (6, 3467565), (9, 2311710), (10, 2080539), (15, 1387026), (18, 1155855), (27, 770570), (30, 693513), (45, 462342), (54, 385285), (90, 231171), (135, 154114), (251, 82890), (270, 77057), (307, 67770), (502, 41445), (614, 33885), (753, 27630), (921, 22590), (1255, 16578), (1506, 13815), (1535, 13554), (1842, 11295), (2259, 9210), (2510, 8289), (2763, 7530), (3070, 6777), (3765, 5526), (4518, 4605)]