257702920

素因数分解:

$2^3\times 5^1\times {\mathrm{6442573}}^1$

素因数の和:6442584

約数の個数: 16

約数和(自身を含む): 579831660

約数和(自身を除く): 322128740

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 6442573, 12885146, 25770292, 32212865, 51540584, 64425730, 128851460, 257702920]

約数ペア:

[(1, 257702920), (2, 128851460), (4, 64425730), (5, 51540584), (8, 32212865), (10, 25770292), (20, 12885146), (40, 6442573)]