21253900

素因数分解:

$2^2\times 5^2\times {\mathrm{257}}^1\times {\mathrm{827}}^1$

素因数の和:1098

約数の個数: 36

約数和(自身を含む): 46356408

約数和(自身を除く): 25102508

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 257, 514, 827, 1028, 1285, 1654, 2570, 3308, 4135, 5140, 6425, 8270, 12850, 16540, 20675, 25700, 41350, 82700, 212539, 425078, 850156, 1062695, 2125390, 4250780, 5313475, 10626950, 21253900]

約数ペア:

[(1, 21253900), (2, 10626950), (4, 5313475), (5, 4250780), (10, 2125390), (20, 1062695), (25, 850156), (50, 425078), (100, 212539), (257, 82700), (514, 41350), (827, 25700), (1028, 20675), (1285, 16540), (1654, 12850), (2570, 8270), (3308, 6425), (4135, 5140)]