21770749

素因数分解:

$7^2\times {\mathrm{11}}^1\times {\mathrm{13}}^2\times {\mathrm{239}}^1$

素因数の和:290

約数の個数: 36

約数和(自身を含む): 30041280

約数和(自身を除く): 8270531

約数列:

[1, 7, 11, 13, 49, 77, 91, 143, 169, 239, 539, 637, 1001, 1183, 1673, 1859, 2629, 3107, 7007, 8281, 11711, 13013, 18403, 21749, 34177, 40391, 91091, 128821, 152243, 239239, 282737, 444301, 1674673, 1979159, 3110107, 21770749]

約数ペア:

[(1, 21770749), (7, 3110107), (11, 1979159), (13, 1674673), (49, 444301), (77, 282737), (91, 239239), (143, 152243), (169, 128821), (239, 91091), (539, 40391), (637, 34177), (1001, 21749), (1183, 18403), (1673, 13013), (1859, 11711), (2629, 8281), (3107, 7007)]