21904904

素因数分解:

$2^3\times 7^1\times {\mathrm{391159}}^1$

素因数の和:391172

約数の個数: 16

約数和(自身を含む): 46939200

約数和(自身を除く): 25034296

約数列:

[1, 2, 4, 7, 8, 14, 28, 56, 391159, 782318, 1564636, 2738113, 3129272, 5476226, 10952452, 21904904]

約数ペア:

[(1, 21904904), (2, 10952452), (4, 5476226), (7, 3129272), (8, 2738113), (14, 1564636), (28, 782318), (56, 391159)]