20785000

素因数分解:

$2^3\times 5^4\times {\mathrm{4157}}^1$

素因数の和:4183

約数の個数: 40

約数和(自身を含む): 48710970

約数和(自身を除く): 27925970

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 125, 200, 250, 500, 625, 1000, 1250, 2500, 4157, 5000, 8314, 16628, 20785, 33256, 41570, 83140, 103925, 166280, 207850, 415700, 519625, 831400, 1039250, 2078500, 2598125, 4157000, 5196250, 10392500, 20785000]

約数ペア:

[(1, 20785000), (2, 10392500), (4, 5196250), (5, 4157000), (8, 2598125), (10, 2078500), (20, 1039250), (25, 831400), (40, 519625), (50, 415700), (100, 207850), (125, 166280), (200, 103925), (250, 83140), (500, 41570), (625, 33256), (1000, 20785), (1250, 16628), (2500, 8314), (4157, 5000)]