12420989

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{179}}^1\times {\mathrm{431}}^1$

素因数の和:640

約数の個数: 16

約数和(自身を含む): 14929920

約数和(自身を除く): 2508931

約数列:

[1, 7, 23, 161, 179, 431, 1253, 3017, 4117, 9913, 28819, 69391, 77149, 540043, 1774427, 12420989]

約数ペア:

[(1, 12420989), (7, 1774427), (23, 540043), (161, 77149), (179, 69391), (431, 28819), (1253, 9913), (3017, 4117)]