21691761

素因数分解:

$3^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{11351}}^1$

素因数の和:11381

約数の個数: 24

約数和(自身を含む): 36235584

約数和(自身を除く): 14543823

約数列:

[1, 3, 7, 13, 21, 39, 49, 91, 147, 273, 637, 1911, 11351, 34053, 79457, 147563, 238371, 442689, 556199, 1032941, 1668597, 3098823, 7230587, 21691761]

約数ペア:

[(1, 21691761), (3, 7230587), (7, 3098823), (13, 1668597), (21, 1032941), (39, 556199), (49, 442689), (91, 238371), (147, 147563), (273, 79457), (637, 34053), (1911, 11351)]