21085000

素因数分解:

$2^3\times 5^4\times {\mathrm{4217}}^1$

素因数の和:4243

約数の個数: 40

約数和(自身を含む): 49413870

約数和(自身を除く): 28328870

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 125, 200, 250, 500, 625, 1000, 1250, 2500, 4217, 5000, 8434, 16868, 21085, 33736, 42170, 84340, 105425, 168680, 210850, 421700, 527125, 843400, 1054250, 2108500, 2635625, 4217000, 5271250, 10542500, 21085000]

約数ペア:

[(1, 21085000), (2, 10542500), (4, 5271250), (5, 4217000), (8, 2635625), (10, 2108500), (20, 1054250), (25, 843400), (40, 527125), (50, 421700), (100, 210850), (125, 168680), (200, 105425), (250, 84340), (500, 42170), (625, 33736), (1000, 21085), (1250, 16868), (2500, 8434), (4217, 5000)]