31338760

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{97}}^1\times {\mathrm{197}}^1$

素因数の和:346

約数の個数: 64

約数和(自身を含む): 73347120

約数和(自身を除く): 42008360

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 97, 164, 194, 197, 205, 328, 388, 394, 410, 485, 776, 788, 820, 970, 985, 1576, 1640, 1940, 1970, 3880, 3940, 3977, 7880, 7954, 8077, 15908, 16154, 19109, 19885, 31816, 32308, 38218, 39770, 40385, 64616, 76436, 79540, 80770, 95545, 152872, 159080, 161540, 191090, 323080, 382180, 764360, 783469, 1566938, 3133876, 3917345, 6267752, 7834690, 15669380, 31338760]

約数ペア:

[(1, 31338760), (2, 15669380), (4, 7834690), (5, 6267752), (8, 3917345), (10, 3133876), (20, 1566938), (40, 783469), (41, 764360), (82, 382180), (97, 323080), (164, 191090), (194, 161540), (197, 159080), (205, 152872), (328, 95545), (388, 80770), (394, 79540), (410, 76436), (485, 64616), (776, 40385), (788, 39770), (820, 38218), (970, 32308), (985, 31816), (1576, 19885), (1640, 19109), (1940, 16154), (1970, 15908), (3880, 8077), (3940, 7954), (3977, 7880)]