51643640

素因数分解:

$2^3\times 5^1\times {\mathrm{389}}^1\times {\mathrm{3319}}^1$

素因数の和:3719

約数の個数: 32

約数和(自身を含む): 116532000

約数和(自身を除く): 64888360

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 389, 778, 1556, 1945, 3112, 3319, 3890, 6638, 7780, 13276, 15560, 16595, 26552, 33190, 66380, 132760, 1291091, 2582182, 5164364, 6455455, 10328728, 12910910, 25821820, 51643640]

約数ペア:

[(1, 51643640), (2, 25821820), (4, 12910910), (5, 10328728), (8, 6455455), (10, 5164364), (20, 2582182), (40, 1291091), (389, 132760), (778, 66380), (1556, 33190), (1945, 26552), (3112, 16595), (3319, 15560), (3890, 13276), (6638, 7780)]