19788560

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{113}}^1\times {\mathrm{199}}^1$

素因数の和:336

約数の個数: 80

約数和(自身を含む): 50889600

約数和(自身を除く): 31101040

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 55, 80, 88, 110, 113, 176, 199, 220, 226, 398, 440, 452, 565, 796, 880, 904, 995, 1130, 1243, 1592, 1808, 1990, 2189, 2260, 2486, 3184, 3980, 4378, 4520, 4972, 6215, 7960, 8756, 9040, 9944, 10945, 12430, 15920, 17512, 19888, 21890, 22487, 24860, 35024, 43780, 44974, 49720, 87560, 89948, 99440, 112435, 175120, 179896, 224870, 247357, 359792, 449740, 494714, 899480, 989428, 1236785, 1798960, 1978856, 2473570, 3957712, 4947140, 9894280, 19788560]

約数ペア:

[(1, 19788560), (2, 9894280), (4, 4947140), (5, 3957712), (8, 2473570), (10, 1978856), (11, 1798960), (16, 1236785), (20, 989428), (22, 899480), (40, 494714), (44, 449740), (55, 359792), (80, 247357), (88, 224870), (110, 179896), (113, 175120), (176, 112435), (199, 99440), (220, 89948), (226, 87560), (398, 49720), (440, 44974), (452, 43780), (565, 35024), (796, 24860), (880, 22487), (904, 21890), (995, 19888), (1130, 17512), (1243, 15920), (1592, 12430), (1808, 10945), (1990, 9944), (2189, 9040), (2260, 8756), (2486, 7960), (3184, 6215), (3980, 4972), (4378, 4520)]