21538643

素因数分解:

$7^1\times {\mathrm{17}}^1\times {\mathrm{47}}^1\times {\mathrm{3851}}^1$

素因数の和:3922

約数の個数: 16

約数和(自身を含む): 26625024

約数和(自身を除く): 5086381

約数列:

[1, 7, 17, 47, 119, 329, 799, 3851, 5593, 26957, 65467, 180997, 458269, 1266979, 3076949, 21538643]

約数ペア:

[(1, 21538643), (7, 3076949), (17, 1266979), (47, 458269), (119, 180997), (329, 65467), (799, 26957), (3851, 5593)]