21595245

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{43}}^1\times {\mathrm{4783}}^1$

素因数の和:4841

約数の個数: 32

約数和(自身を含む): 40415232

約数和(自身を除く): 18819987

約数列:

[1, 3, 5, 7, 15, 21, 35, 43, 105, 129, 215, 301, 645, 903, 1505, 4515, 4783, 14349, 23915, 33481, 71745, 100443, 167405, 205669, 502215, 617007, 1028345, 1439683, 3085035, 4319049, 7198415, 21595245]

約数ペア:

[(1, 21595245), (3, 7198415), (5, 4319049), (7, 3085035), (15, 1439683), (21, 1028345), (35, 617007), (43, 502215), (105, 205669), (129, 167405), (215, 100443), (301, 71745), (645, 33481), (903, 23915), (1505, 14349), (4515, 4783)]