20875000

素因数分解:

$2^3\times 5^6\times {\mathrm{167}}^1$

素因数の和:203

約数の個数: 56

約数和(自身を含む): 49218120

約数和(自身を除く): 28343120

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 125, 167, 200, 250, 334, 500, 625, 668, 835, 1000, 1250, 1336, 1670, 2500, 3125, 3340, 4175, 5000, 6250, 6680, 8350, 12500, 15625, 16700, 20875, 25000, 31250, 33400, 41750, 62500, 83500, 104375, 125000, 167000, 208750, 417500, 521875, 835000, 1043750, 2087500, 2609375, 4175000, 5218750, 10437500, 20875000]

約数ペア:

[(1, 20875000), (2, 10437500), (4, 5218750), (5, 4175000), (8, 2609375), (10, 2087500), (20, 1043750), (25, 835000), (40, 521875), (50, 417500), (100, 208750), (125, 167000), (167, 125000), (200, 104375), (250, 83500), (334, 62500), (500, 41750), (625, 33400), (668, 31250), (835, 25000), (1000, 20875), (1250, 16700), (1336, 15625), (1670, 12500), (2500, 8350), (3125, 6680), (3340, 6250), (4175, 5000)]