81354880

素因数分解:

$2^7\times 5^1\times {\mathrm{317}}^1\times {\mathrm{401}}^1$

素因数の和:737

約数の個数: 64

約数和(自身を含む): 195589080

約数和(自身を除く): 114234200

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 317, 320, 401, 634, 640, 802, 1268, 1585, 1604, 2005, 2536, 3170, 3208, 4010, 5072, 6340, 6416, 8020, 10144, 12680, 12832, 16040, 20288, 25360, 25664, 32080, 40576, 50720, 51328, 64160, 101440, 127117, 128320, 202880, 254234, 256640, 508468, 635585, 1016936, 1271170, 2033872, 2542340, 4067744, 5084680, 8135488, 10169360, 16270976, 20338720, 40677440, 81354880]

約数ペア:

[(1, 81354880), (2, 40677440), (4, 20338720), (5, 16270976), (8, 10169360), (10, 8135488), (16, 5084680), (20, 4067744), (32, 2542340), (40, 2033872), (64, 1271170), (80, 1016936), (128, 635585), (160, 508468), (317, 256640), (320, 254234), (401, 202880), (634, 128320), (640, 127117), (802, 101440), (1268, 64160), (1585, 51328), (1604, 50720), (2005, 40576), (2536, 32080), (3170, 25664), (3208, 25360), (4010, 20288), (5072, 16040), (6340, 12832), (6416, 12680), (8020, 10144)]