20438560

素因数分解:

$2^5\times 5^1\times {\mathrm{139}}^1\times {\mathrm{919}}^1$

素因数の和:1073

約数の個数: 48

約数和(自身を含む): 48686400

約数和(自身を除く): 28247840

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 139, 160, 278, 556, 695, 919, 1112, 1390, 1838, 2224, 2780, 3676, 4448, 4595, 5560, 7352, 9190, 11120, 14704, 18380, 22240, 29408, 36760, 73520, 127741, 147040, 255482, 510964, 638705, 1021928, 1277410, 2043856, 2554820, 4087712, 5109640, 10219280, 20438560]

約数ペア:

[(1, 20438560), (2, 10219280), (4, 5109640), (5, 4087712), (8, 2554820), (10, 2043856), (16, 1277410), (20, 1021928), (32, 638705), (40, 510964), (80, 255482), (139, 147040), (160, 127741), (278, 73520), (556, 36760), (695, 29408), (919, 22240), (1112, 18380), (1390, 14704), (1838, 11120), (2224, 9190), (2780, 7352), (3676, 5560), (4448, 4595)]