21268555

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{55243}}^1$

素因数の和:55266

約数の個数: 16

約数和(自身を含む): 31820544

約数和(自身を除く): 10551989

約数列:

[1, 5, 7, 11, 35, 55, 77, 385, 55243, 276215, 386701, 607673, 1933505, 3038365, 4253711, 21268555]

約数ペア:

[(1, 21268555), (5, 4253711), (7, 3038365), (11, 1933505), (35, 607673), (55, 386701), (77, 276215), (385, 55243)]