40640000

素因数分解:

$2^9\times 5^4\times {\mathrm{127}}^1$

素因数の和:165

約数の個数: 100

約数和(自身を含む): 102267264

約数和(自身を除く): 61627264

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 64, 80, 100, 125, 127, 128, 160, 200, 250, 254, 256, 320, 400, 500, 508, 512, 625, 635, 640, 800, 1000, 1016, 1250, 1270, 1280, 1600, 2000, 2032, 2500, 2540, 2560, 3175, 3200, 4000, 4064, 5000, 5080, 6350, 6400, 8000, 8128, 10000, 10160, 12700, 12800, 15875, 16000, 16256, 20000, 20320, 25400, 31750, 32000, 32512, 40000, 40640, 50800, 63500, 64000, 65024, 79375, 80000, 81280, 101600, 127000, 158750, 160000, 162560, 203200, 254000, 317500, 320000, 325120, 406400, 508000, 635000, 812800, 1016000, 1270000, 1625600, 2032000, 2540000, 4064000, 5080000, 8128000, 10160000, 20320000, 40640000]

約数ペア:

[(1, 40640000), (2, 20320000), (4, 10160000), (5, 8128000), (8, 5080000), (10, 4064000), (16, 2540000), (20, 2032000), (25, 1625600), (32, 1270000), (40, 1016000), (50, 812800), (64, 635000), (80, 508000), (100, 406400), (125, 325120), (127, 320000), (128, 317500), (160, 254000), (200, 203200), (250, 162560), (254, 160000), (256, 158750), (320, 127000), (400, 101600), (500, 81280), (508, 80000), (512, 79375), (625, 65024), (635, 64000), (640, 63500), (800, 50800), (1000, 40640), (1016, 40000), (1250, 32512), (1270, 32000), (1280, 31750), (1600, 25400), (2000, 20320), (2032, 20000), (2500, 16256), (2540, 16000), (2560, 15875), (3175, 12800), (3200, 12700), (4000, 10160), (4064, 10000), (5000, 8128), (5080, 8000), (6350, 6400)]