21699755

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{157}}^1\times {\mathrm{359}}^1$

素因数の和:539

約数の個数: 32

約数和(自身を含む): 32762880

約数和(自身を除く): 11063125

約数列:

[1, 5, 7, 11, 35, 55, 77, 157, 359, 385, 785, 1099, 1727, 1795, 2513, 3949, 5495, 8635, 12089, 12565, 19745, 27643, 56363, 60445, 138215, 281815, 394541, 619993, 1972705, 3099965, 4339951, 21699755]

約数ペア:

[(1, 21699755), (5, 4339951), (7, 3099965), (11, 1972705), (35, 619993), (55, 394541), (77, 281815), (157, 138215), (359, 60445), (385, 56363), (785, 27643), (1099, 19745), (1727, 12565), (1795, 12089), (2513, 8635), (3949, 5495)]