12850000

素因数分解:

$2^4\times 5^5\times {\mathrm{257}}^1$

素因数の和:290

約数の個数: 60

約数和(自身を含む): 31240188

約数和(自身を除く): 18390188

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 125, 200, 250, 257, 400, 500, 514, 625, 1000, 1028, 1250, 1285, 2000, 2056, 2500, 2570, 3125, 4112, 5000, 5140, 6250, 6425, 10000, 10280, 12500, 12850, 20560, 25000, 25700, 32125, 50000, 51400, 64250, 102800, 128500, 160625, 257000, 321250, 514000, 642500, 803125, 1285000, 1606250, 2570000, 3212500, 6425000, 12850000]

約数ペア:

[(1, 12850000), (2, 6425000), (4, 3212500), (5, 2570000), (8, 1606250), (10, 1285000), (16, 803125), (20, 642500), (25, 514000), (40, 321250), (50, 257000), (80, 160625), (100, 128500), (125, 102800), (200, 64250), (250, 51400), (257, 50000), (400, 32125), (500, 25700), (514, 25000), (625, 20560), (1000, 12850), (1028, 12500), (1250, 10280), (1285, 10000), (2000, 6425), (2056, 6250), (2500, 5140), (2570, 5000), (3125, 4112)]