126400000

素因数分解:

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

素因数の和:122

約数の個数: 120

約数和(自身を含む): 319667040

約数和(自身を除く): 193267040

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, 3125, 3160, 3200, 3950, 4000, 5000, 5056, 6250, 6320, 6400, 7900, 8000, 9875, 10000, 10112, 12500, 12640, 12800, 15800, 16000, 19750, 20000, 20224, 25000, 25280, 31600, 32000, 39500, 40000, 40448, 49375, 50000, 50560, 63200, 64000, 79000, 80000, 98750, 100000, 101120, 126400, 158000, 160000, 197500, 200000, 202240, 246875, 252800, 316000, 320000, 395000, 400000, 493750, 505600, 632000, 790000, 800000, 987500, 1011200, 1264000, 1580000, 1600000, 1975000, 2528000, 3160000, 3950000, 5056000, 6320000, 7900000, 12640000, 15800000, 25280000, 31600000, 63200000, 126400000]

約数ペア:

[(1, 126400000), (2, 63200000), (4, 31600000), (5, 25280000), (8, 15800000), (10, 12640000), (16, 7900000), (20, 6320000), (25, 5056000), (32, 3950000), (40, 3160000), (50, 2528000), (64, 1975000), (79, 1600000), (80, 1580000), (100, 1264000), (125, 1011200), (128, 987500), (158, 800000), (160, 790000), (200, 632000), (250, 505600), (256, 493750), (316, 400000), (320, 395000), (395, 320000), (400, 316000), (500, 252800), (512, 246875), (625, 202240), (632, 200000), (640, 197500), (790, 160000), (800, 158000), (1000, 126400), (1250, 101120), (1264, 100000), (1280, 98750), (1580, 80000), (1600, 79000), (1975, 64000), (2000, 63200), (2500, 50560), (2528, 50000), (2560, 49375), (3125, 40448), (3160, 40000), (3200, 39500), (3950, 32000), (4000, 31600), (5000, 25280), (5056, 25000), (6250, 20224), (6320, 20000), (6400, 19750), (7900, 16000), (8000, 15800), (9875, 12800), (10000, 12640), (10112, 12500)]