21389938

素因数分解:

$2^1\times {\mathrm{31}}^3\times {\mathrm{359}}^1$

素因数の和:454

約数の個数: 16

約数和(自身を含む): 33246720

約数和(自身を除く): 11856782

約数列:

[1, 2, 31, 62, 359, 718, 961, 1922, 11129, 22258, 29791, 59582, 344999, 689998, 10694969, 21389938]

約数ペア:

[(1, 21389938), (2, 10694969), (31, 689998), (62, 344999), (359, 59582), (718, 29791), (961, 22258), (1922, 11129)]