21030880

素因数分解:

$2^5\times 5^1\times {\mathrm{13}}^1\times {\mathrm{10111}}^1$

素因数の和:10139

約数の個数: 48

約数和(自身を含む): 53512704

約数和(自身を除く): 32481824

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 65, 80, 104, 130, 160, 208, 260, 416, 520, 1040, 2080, 10111, 20222, 40444, 50555, 80888, 101110, 131443, 161776, 202220, 262886, 323552, 404440, 525772, 657215, 808880, 1051544, 1314430, 1617760, 2103088, 2628860, 4206176, 5257720, 10515440, 21030880]

約数ペア:

[(1, 21030880), (2, 10515440), (4, 5257720), (5, 4206176), (8, 2628860), (10, 2103088), (13, 1617760), (16, 1314430), (20, 1051544), (26, 808880), (32, 657215), (40, 525772), (52, 404440), (65, 323552), (80, 262886), (104, 202220), (130, 161776), (160, 131443), (208, 101110), (260, 80888), (416, 50555), (520, 40444), (1040, 20222), (2080, 10111)]