21906639

素因数分解:

$3^3\times {\mathrm{19}}^1\times {\mathrm{42703}}^1$

素因数の和:42731

約数の個数: 16

約数和(自身を含む): 34163200

約数和(自身を除く): 12256561

約数列:

[1, 3, 9, 19, 27, 57, 171, 513, 42703, 128109, 384327, 811357, 1152981, 2434071, 7302213, 21906639]

約数ペア:

[(1, 21906639), (3, 7302213), (9, 2434071), (19, 1152981), (27, 811357), (57, 384327), (171, 128109), (513, 42703)]