128398720

素因数分解:

$2^7\times 5^1\times {\mathrm{439}}^1\times {\mathrm{457}}^1$

素因数の和:915

約数の個数: 64

約数和(自身を含む): 308325600

約数和(自身を除く): 179926880

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 439, 457, 640, 878, 914, 1756, 1828, 2195, 2285, 3512, 3656, 4390, 4570, 7024, 7312, 8780, 9140, 14048, 14624, 17560, 18280, 28096, 29248, 35120, 36560, 56192, 58496, 70240, 73120, 140480, 146240, 200623, 280960, 292480, 401246, 802492, 1003115, 1604984, 2006230, 3209968, 4012460, 6419936, 8024920, 12839872, 16049840, 25679744, 32099680, 64199360, 128398720]

約数ペア:

[(1, 128398720), (2, 64199360), (4, 32099680), (5, 25679744), (8, 16049840), (10, 12839872), (16, 8024920), (20, 6419936), (32, 4012460), (40, 3209968), (64, 2006230), (80, 1604984), (128, 1003115), (160, 802492), (320, 401246), (439, 292480), (457, 280960), (640, 200623), (878, 146240), (914, 140480), (1756, 73120), (1828, 70240), (2195, 58496), (2285, 56192), (3512, 36560), (3656, 35120), (4390, 29248), (4570, 28096), (7024, 18280), (7312, 17560), (8780, 14624), (9140, 14048)]