25280000

素因数分解:

$2^9\times 5^4\times {\mathrm{79}}^1$

素因数の和:117

約数の個数: 100

約数和(自身を含む): 63917040

約数和(自身を除く): 38637040

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 64, 79, 80, 100, 125, 128, 158, 160, 200, 250, 256, 316, 320, 395, 400, 500, 512, 625, 632, 640, 790, 800, 1000, 1250, 1264, 1280, 1580, 1600, 1975, 2000, 2500, 2528, 2560, 3160, 3200, 3950, 4000, 5000, 5056, 6320, 6400, 7900, 8000, 9875, 10000, 10112, 12640, 12800, 15800, 16000, 19750, 20000, 20224, 25280, 31600, 32000, 39500, 40000, 40448, 49375, 50560, 63200, 64000, 79000, 80000, 98750, 101120, 126400, 158000, 160000, 197500, 202240, 252800, 316000, 320000, 395000, 505600, 632000, 790000, 1011200, 1264000, 1580000, 2528000, 3160000, 5056000, 6320000, 12640000, 25280000]

約数ペア:

[(1, 25280000), (2, 12640000), (4, 6320000), (5, 5056000), (8, 3160000), (10, 2528000), (16, 1580000), (20, 1264000), (25, 1011200), (32, 790000), (40, 632000), (50, 505600), (64, 395000), (79, 320000), (80, 316000), (100, 252800), (125, 202240), (128, 197500), (158, 160000), (160, 158000), (200, 126400), (250, 101120), (256, 98750), (316, 80000), (320, 79000), (395, 64000), (400, 63200), (500, 50560), (512, 49375), (625, 40448), (632, 40000), (640, 39500), (790, 32000), (800, 31600), (1000, 25280), (1250, 20224), (1264, 20000), (1280, 19750), (1580, 16000), (1600, 15800), (1975, 12800), (2000, 12640), (2500, 10112), (2528, 10000), (2560, 9875), (3160, 8000), (3200, 7900), (3950, 6400), (4000, 6320), (5000, 5056)]