20421345

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{43}}^1\times {\mathrm{4523}}^1$

素因数の和:4581

約数の個数: 32

約数和(自身を含む): 38218752

約数和(自身を除く): 17797407

約数列:

[1, 3, 5, 7, 15, 21, 35, 43, 105, 129, 215, 301, 645, 903, 1505, 4515, 4523, 13569, 22615, 31661, 67845, 94983, 158305, 194489, 474915, 583467, 972445, 1361423, 2917335, 4084269, 6807115, 20421345]

約数ペア:

[(1, 20421345), (3, 6807115), (5, 4084269), (7, 2917335), (15, 1361423), (21, 972445), (35, 583467), (43, 474915), (105, 194489), (129, 158305), (215, 94983), (301, 67845), (645, 31661), (903, 22615), (1505, 13569), (4515, 4523)]