399616

素因数分解:

$2^8\times 7^1\times {\mathrm{223}}^1$

素因数の和:246

約数の個数: 36

約数和(自身を含む): 915712

約数和(自身を除く): 516096

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 32, 56, 64, 112, 128, 223, 224, 256, 446, 448, 892, 896, 1561, 1784, 1792, 3122, 3568, 6244, 7136, 12488, 14272, 24976, 28544, 49952, 57088, 99904, 199808, 399616]

約数ペア:

[(1, 399616), (2, 199808), (4, 99904), (7, 57088), (8, 49952), (14, 28544), (16, 24976), (28, 14272), (32, 12488), (56, 7136), (64, 6244), (112, 3568), (128, 3122), (223, 1792), (224, 1784), (256, 1561), (446, 896), (448, 892)]