21189245

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{47}}^1\times {\mathrm{1171}}^1$

素因数の和:1241

約数の個数: 32

約数和(自身を含む): 32403456

約数和(自身を除く): 11214211

約数列:

[1, 5, 7, 11, 35, 47, 55, 77, 235, 329, 385, 517, 1171, 1645, 2585, 3619, 5855, 8197, 12881, 18095, 40985, 55037, 64405, 90167, 275185, 385259, 450835, 605407, 1926295, 3027035, 4237849, 21189245]

約数ペア:

[(1, 21189245), (5, 4237849), (7, 3027035), (11, 1926295), (35, 605407), (47, 450835), (55, 385259), (77, 275185), (235, 90167), (329, 64405), (385, 55037), (517, 40985), (1171, 18095), (1645, 12881), (2585, 8197), (3619, 5855)]