207688520

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{399401}}^1$

素因数の和:399425

約数の個数: 32

約数和(自身を含む): 503246520

約数和(自身を除く): 295558000

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 399401, 798802, 1597604, 1997005, 3195208, 3994010, 5192213, 7988020, 10384426, 15976040, 20768852, 25961065, 41537704, 51922130, 103844260, 207688520]

約数ペア:

[(1, 207688520), (2, 103844260), (4, 51922130), (5, 41537704), (8, 25961065), (10, 20768852), (13, 15976040), (20, 10384426), (26, 7988020), (40, 5192213), (52, 3994010), (65, 3195208), (104, 1997005), (130, 1597604), (260, 798802), (520, 399401)]