21426433

素因数分解:

$7^1\times {\mathrm{19}}^2\times {\mathrm{61}}^1\times {\mathrm{139}}^1$

素因数の和:245

約数の個数: 24

約数和(自身を含む): 26456640

約数和(自身を除く): 5030207

約数列:

[1, 7, 19, 61, 133, 139, 361, 427, 973, 1159, 2527, 2641, 8113, 8479, 18487, 22021, 50179, 59353, 154147, 161101, 351253, 1127707, 3060919, 21426433]

約数ペア:

[(1, 21426433), (7, 3060919), (19, 1127707), (61, 351253), (133, 161101), (139, 154147), (361, 59353), (427, 50179), (973, 22021), (1159, 18487), (2527, 8479), (2641, 8113)]