21446840

素因数分解:

$2^3\times 5^1\times {\mathrm{109}}^1\times {\mathrm{4919}}^1$

素因数の和:5039

約数の個数: 32

約数和(自身を含む): 48708000

約数和(自身を除く): 27261160

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 109, 218, 436, 545, 872, 1090, 2180, 4360, 4919, 9838, 19676, 24595, 39352, 49190, 98380, 196760, 536171, 1072342, 2144684, 2680855, 4289368, 5361710, 10723420, 21446840]

約数ペア:

[(1, 21446840), (2, 10723420), (4, 5361710), (5, 4289368), (8, 2680855), (10, 2144684), (20, 1072342), (40, 536171), (109, 196760), (218, 98380), (436, 49190), (545, 39352), (872, 24595), (1090, 19676), (2180, 9838), (4360, 4919)]