399218008

素因数分解:

$2^3\times 7^1\times {\mathrm{139}}^1\times {\mathrm{51287}}^1$

素因数の和:51439

約数の個数: 32

約数和(自身を含む): 861638400

約数和(自身を除く): 462420392

約数列:

[1, 2, 4, 7, 8, 14, 28, 56, 139, 278, 556, 973, 1112, 1946, 3892, 7784, 51287, 102574, 205148, 359009, 410296, 718018, 1436036, 2872072, 7128893, 14257786, 28515572, 49902251, 57031144, 99804502, 199609004, 399218008]

約数ペア:

[(1, 399218008), (2, 199609004), (4, 99804502), (7, 57031144), (8, 49902251), (14, 28515572), (28, 14257786), (56, 7128893), (139, 2872072), (278, 1436036), (556, 718018), (973, 410296), (1112, 359009), (1946, 205148), (3892, 102574), (7784, 51287)]