1279840000

素因数分解:

$2^8\times 5^4\times {\mathrm{19}}^1\times {\mathrm{421}}^1$

素因数の和:476

約数の個数: 180

約数和(自身を含む): 3368328040

約数和(自身を除く): 2088488040

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 25, 32, 38, 40, 50, 64, 76, 80, 95, 100, 125, 128, 152, 160, 190, 200, 250, 256, 304, 320, 380, 400, 421, 475, 500, 608, 625, 640, 760, 800, 842, 950, 1000, 1216, 1250, 1280, 1520, 1600, 1684, 1900, 2000, 2105, 2375, 2432, 2500, 3040, 3200, 3368, 3800, 4000, 4210, 4750, 4864, 5000, 6080, 6400, 6736, 7600, 7999, 8000, 8420, 9500, 10000, 10525, 11875, 12160, 13472, 15200, 15998, 16000, 16840, 19000, 20000, 21050, 23750, 24320, 26944, 30400, 31996, 32000, 33680, 38000, 39995, 40000, 42100, 47500, 52625, 53888, 60800, 63992, 67360, 76000, 79990, 80000, 84200, 95000, 105250, 107776, 121600, 127984, 134720, 152000, 159980, 160000, 168400, 190000, 199975, 210500, 255968, 263125, 269440, 304000, 319960, 336800, 380000, 399950, 421000, 511936, 526250, 538880, 608000, 639920, 673600, 760000, 799900, 842000, 999875, 1023872, 1052500, 1279840, 1347200, 1520000, 1599800, 1684000, 1999750, 2047744, 2105000, 2559680, 2694400, 3040000, 3199600, 3368000, 3999500, 4210000, 4999375, 5119360, 6399200, 6736000, 7999000, 8420000, 9998750, 10238720, 12798400, 13472000, 15998000, 16840000, 19997500, 25596800, 31996000, 33680000, 39995000, 51193600, 63992000, 67360000, 79990000, 127984000, 159980000, 255968000, 319960000, 639920000, 1279840000]

約数ペア:

[(1, 1279840000), (2, 639920000), (4, 319960000), (5, 255968000), (8, 159980000), (10, 127984000), (16, 79990000), (19, 67360000), (20, 63992000), (25, 51193600), (32, 39995000), (38, 33680000), (40, 31996000), (50, 25596800), (64, 19997500), (76, 16840000), (80, 15998000), (95, 13472000), (100, 12798400), (125, 10238720), (128, 9998750), (152, 8420000), (160, 7999000), (190, 6736000), (200, 6399200), (250, 5119360), (256, 4999375), (304, 4210000), (320, 3999500), (380, 3368000), (400, 3199600), (421, 3040000), (475, 2694400), (500, 2559680), (608, 2105000), (625, 2047744), (640, 1999750), (760, 1684000), (800, 1599800), (842, 1520000), (950, 1347200), (1000, 1279840), (1216, 1052500), (1250, 1023872), (1280, 999875), (1520, 842000), (1600, 799900), (1684, 760000), (1900, 673600), (2000, 639920), (2105, 608000), (2375, 538880), (2432, 526250), (2500, 511936), (3040, 421000), (3200, 399950), (3368, 380000), (3800, 336800), (4000, 319960), (4210, 304000), (4750, 269440), (4864, 263125), (5000, 255968), (6080, 210500), (6400, 199975), (6736, 190000), (7600, 168400), (7999, 160000), (8000, 159980), (8420, 152000), (9500, 134720), (10000, 127984), (10525, 121600), (11875, 107776), (12160, 105250), (13472, 95000), (15200, 84200), (15998, 80000), (16000, 79990), (16840, 76000), (19000, 67360), (20000, 63992), (21050, 60800), (23750, 53888), (24320, 52625), (26944, 47500), (30400, 42100), (31996, 40000), (32000, 39995), (33680, 38000)]