257320

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{919}}^1$

素因数の和:937

約数の個数: 32

約数和(自身を含む): 662400

約数和(自身を除く): 405080

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 919, 1838, 3676, 4595, 6433, 7352, 9190, 12866, 18380, 25732, 32165, 36760, 51464, 64330, 128660, 257320]

約数ペア:

[(1, 257320), (2, 128660), (4, 64330), (5, 51464), (7, 36760), (8, 32165), (10, 25732), (14, 18380), (20, 12866), (28, 9190), (35, 7352), (40, 6433), (56, 4595), (70, 3676), (140, 1838), (280, 919)]