278836760

素因数分解:

$2^3\times 5^1\times {\mathrm{101}}^1\times {\mathrm{69019}}^1$

素因数の和:69131

約数の個数: 32

約数和(自身を含む): 633603600

約数和(自身を除く): 354766840

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 101, 202, 404, 505, 808, 1010, 2020, 4040, 69019, 138038, 276076, 345095, 552152, 690190, 1380380, 2760760, 6970919, 13941838, 27883676, 34854595, 55767352, 69709190, 139418380, 278836760]

約数ペア:

[(1, 278836760), (2, 139418380), (4, 69709190), (5, 55767352), (8, 34854595), (10, 27883676), (20, 13941838), (40, 6970919), (101, 2760760), (202, 1380380), (404, 690190), (505, 552152), (808, 345095), (1010, 276076), (2020, 138038), (4040, 69019)]