64799620

素因数分解:

$2^2\times 5^1\times {\mathrm{389}}^1\times {\mathrm{8329}}^1$

素因数の和:8727

約数の個数: 24

約数和(自身を含む): 136445400

約数和(自身を除く): 71645780

約数列:

[1, 2, 4, 5, 10, 20, 389, 778, 1556, 1945, 3890, 7780, 8329, 16658, 33316, 41645, 83290, 166580, 3239981, 6479962, 12959924, 16199905, 32399810, 64799620]

約数ペア:

[(1, 64799620), (2, 32399810), (4, 16199905), (5, 12959924), (10, 6479962), (20, 3239981), (389, 166580), (778, 83290), (1556, 41645), (1945, 33316), (3890, 16658), (7780, 8329)]