81020720

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{4003}}^1$

素因数の和:4050

約数の個数: 80

約数和(自身を含む): 214486272

約数和(自身を除く): 133465552

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 23, 40, 44, 46, 55, 80, 88, 92, 110, 115, 176, 184, 220, 230, 253, 368, 440, 460, 506, 880, 920, 1012, 1265, 1840, 2024, 2530, 4003, 4048, 5060, 8006, 10120, 16012, 20015, 20240, 32024, 40030, 44033, 64048, 80060, 88066, 92069, 160120, 176132, 184138, 220165, 320240, 352264, 368276, 440330, 460345, 704528, 736552, 880660, 920690, 1012759, 1473104, 1761320, 1841380, 2025518, 3522640, 3682760, 4051036, 5063795, 7365520, 8102072, 10127590, 16204144, 20255180, 40510360, 81020720]

約数ペア:

[(1, 81020720), (2, 40510360), (4, 20255180), (5, 16204144), (8, 10127590), (10, 8102072), (11, 7365520), (16, 5063795), (20, 4051036), (22, 3682760), (23, 3522640), (40, 2025518), (44, 1841380), (46, 1761320), (55, 1473104), (80, 1012759), (88, 920690), (92, 880660), (110, 736552), (115, 704528), (176, 460345), (184, 440330), (220, 368276), (230, 352264), (253, 320240), (368, 220165), (440, 184138), (460, 176132), (506, 160120), (880, 92069), (920, 88066), (1012, 80060), (1265, 64048), (1840, 44033), (2024, 40030), (2530, 32024), (4003, 20240), (4048, 20015), (5060, 16012), (8006, 10120)]