87121520

素因数分解:

$2^4\times 5^1\times {\mathrm{97}}^1\times {\mathrm{103}}^1\times {\mathrm{109}}^1$

素因数の和:322

約数の個数: 80

約数和(自身を含む): 208528320

約数和(自身を除く): 121406800

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 97, 103, 109, 194, 206, 218, 388, 412, 436, 485, 515, 545, 776, 824, 872, 970, 1030, 1090, 1552, 1648, 1744, 1940, 2060, 2180, 3880, 4120, 4360, 7760, 8240, 8720, 9991, 10573, 11227, 19982, 21146, 22454, 39964, 42292, 44908, 49955, 52865, 56135, 79928, 84584, 89816, 99910, 105730, 112270, 159856, 169168, 179632, 199820, 211460, 224540, 399640, 422920, 449080, 799280, 845840, 898160, 1089019, 2178038, 4356076, 5445095, 8712152, 10890190, 17424304, 21780380, 43560760, 87121520]

約数ペア:

[(1, 87121520), (2, 43560760), (4, 21780380), (5, 17424304), (8, 10890190), (10, 8712152), (16, 5445095), (20, 4356076), (40, 2178038), (80, 1089019), (97, 898160), (103, 845840), (109, 799280), (194, 449080), (206, 422920), (218, 399640), (388, 224540), (412, 211460), (436, 199820), (485, 179632), (515, 169168), (545, 159856), (776, 112270), (824, 105730), (872, 99910), (970, 89816), (1030, 84584), (1090, 79928), (1552, 56135), (1648, 52865), (1744, 49955), (1940, 44908), (2060, 42292), (2180, 39964), (3880, 22454), (4120, 21146), (4360, 19982), (7760, 11227), (8240, 10573), (8720, 9991)]