21505904

素因数分解:

$2^4\times 7^2\times {\mathrm{27431}}^1$

素因数の和:27453

約数の個数: 30

約数和(自身を含む): 48472344

約数和(自身を除く): 26966440

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 49, 56, 98, 112, 196, 392, 784, 27431, 54862, 109724, 192017, 219448, 384034, 438896, 768068, 1344119, 1536136, 2688238, 3072272, 5376476, 10752952, 21505904]

約数ペア:

[(1, 21505904), (2, 10752952), (4, 5376476), (7, 3072272), (8, 2688238), (14, 1536136), (16, 1344119), (28, 768068), (49, 438896), (56, 384034), (98, 219448), (112, 192017), (196, 109724), (392, 54862), (784, 27431)]