20155520

素因数分解:

$2^7\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{409}}^1$

素因数の和:446

約数の個数: 128

約数和(自身を含む): 60220800

約数和(自身を除く): 40065280

約数列:

[1, 2, 4, 5, 7, 8, 10, 11, 14, 16, 20, 22, 28, 32, 35, 40, 44, 55, 56, 64, 70, 77, 80, 88, 110, 112, 128, 140, 154, 160, 176, 220, 224, 280, 308, 320, 352, 385, 409, 440, 448, 560, 616, 640, 704, 770, 818, 880, 896, 1120, 1232, 1408, 1540, 1636, 1760, 2045, 2240, 2464, 2863, 3080, 3272, 3520, 4090, 4480, 4499, 4928, 5726, 6160, 6544, 7040, 8180, 8998, 9856, 11452, 12320, 13088, 14315, 16360, 17996, 22495, 22904, 24640, 26176, 28630, 31493, 32720, 35992, 44990, 45808, 49280, 52352, 57260, 62986, 65440, 71984, 89980, 91616, 114520, 125972, 130880, 143968, 157465, 179960, 183232, 229040, 251944, 261760, 287936, 314930, 359920, 366464, 458080, 503888, 575872, 629860, 719840, 916160, 1007776, 1259720, 1439680, 1832320, 2015552, 2519440, 2879360, 4031104, 5038880, 10077760, 20155520]

約数ペア:

[(1, 20155520), (2, 10077760), (4, 5038880), (5, 4031104), (7, 2879360), (8, 2519440), (10, 2015552), (11, 1832320), (14, 1439680), (16, 1259720), (20, 1007776), (22, 916160), (28, 719840), (32, 629860), (35, 575872), (40, 503888), (44, 458080), (55, 366464), (56, 359920), (64, 314930), (70, 287936), (77, 261760), (80, 251944), (88, 229040), (110, 183232), (112, 179960), (128, 157465), (140, 143968), (154, 130880), (160, 125972), (176, 114520), (220, 91616), (224, 89980), (280, 71984), (308, 65440), (320, 62986), (352, 57260), (385, 52352), (409, 49280), (440, 45808), (448, 44990), (560, 35992), (616, 32720), (640, 31493), (704, 28630), (770, 26176), (818, 24640), (880, 22904), (896, 22495), (1120, 17996), (1232, 16360), (1408, 14315), (1540, 13088), (1636, 12320), (1760, 11452), (2045, 9856), (2240, 8998), (2464, 8180), (2863, 7040), (3080, 6544), (3272, 6160), (3520, 5726), (4090, 4928), (4480, 4499)]