128342800

素因数分解:

$2^4\times 5^2\times {\mathrm{499}}^1\times {\mathrm{643}}^1$

素因数の和:1160

約数の個数: 60

約数和(自身を含む): 309442000

約数和(自身を除く): 181099200

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400, 499, 643, 998, 1286, 1996, 2495, 2572, 3215, 3992, 4990, 5144, 6430, 7984, 9980, 10288, 12475, 12860, 16075, 19960, 24950, 25720, 32150, 39920, 49900, 51440, 64300, 99800, 128600, 199600, 257200, 320857, 641714, 1283428, 1604285, 2566856, 3208570, 5133712, 6417140, 8021425, 12834280, 16042850, 25668560, 32085700, 64171400, 128342800]

約数ペア:

[(1, 128342800), (2, 64171400), (4, 32085700), (5, 25668560), (8, 16042850), (10, 12834280), (16, 8021425), (20, 6417140), (25, 5133712), (40, 3208570), (50, 2566856), (80, 1604285), (100, 1283428), (200, 641714), (400, 320857), (499, 257200), (643, 199600), (998, 128600), (1286, 99800), (1996, 64300), (2495, 51440), (2572, 49900), (3215, 39920), (3992, 32150), (4990, 25720), (5144, 24950), (6430, 19960), (7984, 16075), (9980, 12860), (10288, 12475)]