128500000

素因数分解:

$2^5\times 5^6\times {\mathrm{257}}^1$

素因数の和:297

約数の個数: 84

約数和(自身を含む): 317456874

約数和(自身を除く): 188956874

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 80, 100, 125, 160, 200, 250, 257, 400, 500, 514, 625, 800, 1000, 1028, 1250, 1285, 2000, 2056, 2500, 2570, 3125, 4000, 4112, 5000, 5140, 6250, 6425, 8224, 10000, 10280, 12500, 12850, 15625, 20000, 20560, 25000, 25700, 31250, 32125, 41120, 50000, 51400, 62500, 64250, 100000, 102800, 125000, 128500, 160625, 205600, 250000, 257000, 321250, 500000, 514000, 642500, 803125, 1028000, 1285000, 1606250, 2570000, 3212500, 4015625, 5140000, 6425000, 8031250, 12850000, 16062500, 25700000, 32125000, 64250000, 128500000]

約数ペア:

[(1, 128500000), (2, 64250000), (4, 32125000), (5, 25700000), (8, 16062500), (10, 12850000), (16, 8031250), (20, 6425000), (25, 5140000), (32, 4015625), (40, 3212500), (50, 2570000), (80, 1606250), (100, 1285000), (125, 1028000), (160, 803125), (200, 642500), (250, 514000), (257, 500000), (400, 321250), (500, 257000), (514, 250000), (625, 205600), (800, 160625), (1000, 128500), (1028, 125000), (1250, 102800), (1285, 100000), (2000, 64250), (2056, 62500), (2500, 51400), (2570, 50000), (3125, 41120), (4000, 32125), (4112, 31250), (5000, 25700), (5140, 25000), (6250, 20560), (6425, 20000), (8224, 15625), (10000, 12850), (10280, 12500)]