21228977

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{11987}}^1$

素因数の和:12028

約数の個数: 16

約数和(自身を含む): 27620352

約数和(自身を除く): 6391375

約数列:

[1, 7, 11, 23, 77, 161, 253, 1771, 11987, 83909, 131857, 275701, 922999, 1929907, 3032711, 21228977]

約数ペア:

[(1, 21228977), (7, 3032711), (11, 1929907), (23, 922999), (77, 275701), (161, 131857), (253, 83909), (1771, 11987)]