81350000

素因数分解:

$2^4\times 5^5\times {\mathrm{1627}}^1$

素因数の和:1660

約数の個数: 60

約数和(自身を含む): 197128008

約数和(自身を除く): 115778008

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 125, 200, 250, 400, 500, 625, 1000, 1250, 1627, 2000, 2500, 3125, 3254, 5000, 6250, 6508, 8135, 10000, 12500, 13016, 16270, 25000, 26032, 32540, 40675, 50000, 65080, 81350, 130160, 162700, 203375, 325400, 406750, 650800, 813500, 1016875, 1627000, 2033750, 3254000, 4067500, 5084375, 8135000, 10168750, 16270000, 20337500, 40675000, 81350000]

約数ペア:

[(1, 81350000), (2, 40675000), (4, 20337500), (5, 16270000), (8, 10168750), (10, 8135000), (16, 5084375), (20, 4067500), (25, 3254000), (40, 2033750), (50, 1627000), (80, 1016875), (100, 813500), (125, 650800), (200, 406750), (250, 325400), (400, 203375), (500, 162700), (625, 130160), (1000, 81350), (1250, 65080), (1627, 50000), (2000, 40675), (2500, 32540), (3125, 26032), (3254, 25000), (5000, 16270), (6250, 13016), (6508, 12500), (8135, 10000)]