20418321

素因数分解:

$3^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{157}}^1\times {\mathrm{563}}^1$

素因数の和:741

約数の個数: 32

約数和(自身を含む): 34219008

約数和(自身を除く): 13800687

約数列:

[1, 3, 7, 11, 21, 33, 77, 157, 231, 471, 563, 1099, 1689, 1727, 3297, 3941, 5181, 6193, 11823, 12089, 18579, 36267, 43351, 88391, 130053, 265173, 618737, 972301, 1856211, 2916903, 6806107, 20418321]

約数ペア:

[(1, 20418321), (3, 6806107), (7, 2916903), (11, 1856211), (21, 972301), (33, 618737), (77, 265173), (157, 130053), (231, 88391), (471, 43351), (563, 36267), (1099, 18579), (1689, 12089), (1727, 11823), (3297, 6193), (3941, 5181)]