25700000

素因数分解:

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

素因数の和:292

約数の個数: 72

約数和(自身を含む): 63488124

約数和(自身を除く): 37788124

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, 20000, 20560, 25000, 25700, 32125, 41120, 50000, 51400, 64250, 100000, 102800, 128500, 160625, 205600, 257000, 321250, 514000, 642500, 803125, 1028000, 1285000, 1606250, 2570000, 3212500, 5140000, 6425000, 12850000, 25700000]

約数ペア:

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