397520

素因数分解:

$2^4\times 5^1\times {\mathrm{4969}}^1$

素因数の和:4982

約数の個数: 20

約数和(自身を含む): 924420

約数和(自身を除く): 526900

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 4969, 9938, 19876, 24845, 39752, 49690, 79504, 99380, 198760, 397520]

約数ペア:

[(1, 397520), (2, 198760), (4, 99380), (5, 79504), (8, 49690), (10, 39752), (16, 24845), (20, 19876), (40, 9938), (80, 4969)]