21005677

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{73}}^1\times {\mathrm{101}}^1$

素因数の和:229

約数の個数: 32

約数和(自身を含む): 27535104

約数和(自身を除く): 6529427

約数列:

[1, 7, 11, 37, 73, 77, 101, 259, 407, 511, 707, 803, 1111, 2701, 2849, 3737, 5621, 7373, 7777, 18907, 26159, 29711, 41107, 51611, 81103, 207977, 272801, 287749, 567721, 1909607, 3000811, 21005677]

約数ペア:

[(1, 21005677), (7, 3000811), (11, 1909607), (37, 567721), (73, 287749), (77, 272801), (101, 207977), (259, 81103), (407, 51611), (511, 41107), (707, 29711), (803, 26159), (1111, 18907), (2701, 7777), (2849, 7373), (3737, 5621)]