21609665

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{37}}^2\times {\mathrm{41}}^1$

素因数の和:138

約数の個数: 48

約数和(自身を含む): 34038144

約数和(自身を除く): 12428479

約数列:

[1, 5, 7, 11, 35, 37, 41, 55, 77, 185, 205, 259, 287, 385, 407, 451, 1295, 1369, 1435, 1517, 2035, 2255, 2849, 3157, 6845, 7585, 9583, 10619, 14245, 15059, 15785, 16687, 47915, 53095, 56129, 75295, 83435, 105413, 116809, 280645, 392903, 527065, 584045, 617419, 1964515, 3087095, 4321933, 21609665]

約数ペア:

[(1, 21609665), (5, 4321933), (7, 3087095), (11, 1964515), (35, 617419), (37, 584045), (41, 527065), (55, 392903), (77, 280645), (185, 116809), (205, 105413), (259, 83435), (287, 75295), (385, 56129), (407, 53095), (451, 47915), (1295, 16687), (1369, 15785), (1435, 15059), (1517, 14245), (2035, 10619), (2255, 9583), (2849, 7585), (3157, 6845)]