21260533

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{37}}^1\times {\mathrm{43}}^1\times {\mathrm{83}}^1$

素因数の和:193

約数の個数: 32

約数和(自身を含む): 26966016

約数和(自身を除く): 5705483

約数列:

[1, 7, 23, 37, 43, 83, 161, 259, 301, 581, 851, 989, 1591, 1909, 3071, 3569, 5957, 6923, 11137, 13363, 21497, 24983, 36593, 70633, 82087, 132053, 256151, 494431, 574609, 924371, 3037219, 21260533]

約数ペア:

[(1, 21260533), (7, 3037219), (23, 924371), (37, 574609), (43, 494431), (83, 256151), (161, 132053), (259, 82087), (301, 70633), (581, 36593), (851, 24983), (989, 21497), (1591, 13363), (1909, 11137), (3071, 6923), (3569, 5957)]