20005978480

素因数分解:

$2^4\times 5^1\times {\mathrm{137}}^1\times {\mathrm{353}}^1\times {\mathrm{5171}}^1$

素因数の和:5674

約数の個数: 80

約数和(自身を含む): 46995233184

約数和(自身を除く): 26989254704

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 137, 274, 353, 548, 685, 706, 1096, 1370, 1412, 1765, 2192, 2740, 2824, 3530, 5171, 5480, 5648, 7060, 10342, 10960, 14120, 20684, 25855, 28240, 41368, 48361, 51710, 82736, 96722, 103420, 193444, 206840, 241805, 386888, 413680, 483610, 708427, 773776, 967220, 1416854, 1825363, 1934440, 2833708, 3542135, 3650726, 3868880, 5667416, 7084270, 7301452, 9126815, 11334832, 14168540, 14602904, 18253630, 28337080, 29205808, 36507260, 56674160, 73014520, 146029040, 250074731, 500149462, 1000298924, 1250373655, 2000597848, 2500747310, 4001195696, 5001494620, 10002989240, 20005978480]

約数ペア:

[(1, 20005978480), (2, 10002989240), (4, 5001494620), (5, 4001195696), (8, 2500747310), (10, 2000597848), (16, 1250373655), (20, 1000298924), (40, 500149462), (80, 250074731), (137, 146029040), (274, 73014520), (353, 56674160), (548, 36507260), (685, 29205808), (706, 28337080), (1096, 18253630), (1370, 14602904), (1412, 14168540), (1765, 11334832), (2192, 9126815), (2740, 7301452), (2824, 7084270), (3530, 5667416), (5171, 3868880), (5480, 3650726), (5648, 3542135), (7060, 2833708), (10342, 1934440), (10960, 1825363), (14120, 1416854), (20684, 967220), (25855, 773776), (28240, 708427), (41368, 483610), (48361, 413680), (51710, 386888), (82736, 241805), (96722, 206840), (103420, 193444)]