21087412

素因数分解:

$2^2\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{97}}^1\times {\mathrm{139}}^1$

素因数の和:280

約数の個数: 48

約数和(自身を含む): 41489280

約数和(自身を除く): 20401868

約数列:

[1, 2, 4, 17, 23, 34, 46, 68, 92, 97, 139, 194, 278, 388, 391, 556, 782, 1564, 1649, 2231, 2363, 3197, 3298, 4462, 4726, 6394, 6596, 8924, 9452, 12788, 13483, 26966, 37927, 53932, 54349, 75854, 108698, 151708, 217396, 229211, 310109, 458422, 620218, 916844, 1240436, 5271853, 10543706, 21087412]

約数ペア:

[(1, 21087412), (2, 10543706), (4, 5271853), (17, 1240436), (23, 916844), (34, 620218), (46, 458422), (68, 310109), (92, 229211), (97, 217396), (139, 151708), (194, 108698), (278, 75854), (388, 54349), (391, 53932), (556, 37927), (782, 26966), (1564, 13483), (1649, 12788), (2231, 9452), (2363, 8924), (3197, 6596), (3298, 6394), (4462, 4726)]