16815920

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{97}}^1\times {\mathrm{197}}^1$

素因数の和:318

約数の個数: 80

約数和(自身を含む): 43309728

約数和(自身を除く): 26493808

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 55, 80, 88, 97, 110, 176, 194, 197, 220, 388, 394, 440, 485, 776, 788, 880, 970, 985, 1067, 1552, 1576, 1940, 1970, 2134, 2167, 3152, 3880, 3940, 4268, 4334, 5335, 7760, 7880, 8536, 8668, 10670, 10835, 15760, 17072, 17336, 19109, 21340, 21670, 34672, 38218, 42680, 43340, 76436, 85360, 86680, 95545, 152872, 173360, 191090, 210199, 305744, 382180, 420398, 764360, 840796, 1050995, 1528720, 1681592, 2101990, 3363184, 4203980, 8407960, 16815920]

約数ペア:

[(1, 16815920), (2, 8407960), (4, 4203980), (5, 3363184), (8, 2101990), (10, 1681592), (11, 1528720), (16, 1050995), (20, 840796), (22, 764360), (40, 420398), (44, 382180), (55, 305744), (80, 210199), (88, 191090), (97, 173360), (110, 152872), (176, 95545), (194, 86680), (197, 85360), (220, 76436), (388, 43340), (394, 42680), (440, 38218), (485, 34672), (776, 21670), (788, 21340), (880, 19109), (970, 17336), (985, 17072), (1067, 15760), (1552, 10835), (1576, 10670), (1940, 8668), (1970, 8536), (2134, 7880), (2167, 7760), (3152, 5335), (3880, 4334), (3940, 4268)]