80915780

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{197}}^1\times {\mathrm{1867}}^1$

素因数の和:2084

約数の個数: 48

約数和(自身を含む): 186411456

約数和(自身を除く): 105495676

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 197, 220, 394, 788, 985, 1867, 1970, 2167, 3734, 3940, 4334, 7468, 8668, 9335, 10835, 18670, 20537, 21670, 37340, 41074, 43340, 82148, 102685, 205370, 367799, 410740, 735598, 1471196, 1838995, 3677990, 4045789, 7355980, 8091578, 16183156, 20228945, 40457890, 80915780]

約数ペア:

[(1, 80915780), (2, 40457890), (4, 20228945), (5, 16183156), (10, 8091578), (11, 7355980), (20, 4045789), (22, 3677990), (44, 1838995), (55, 1471196), (110, 735598), (197, 410740), (220, 367799), (394, 205370), (788, 102685), (985, 82148), (1867, 43340), (1970, 41074), (2167, 37340), (3734, 21670), (3940, 20537), (4334, 18670), (7468, 10835), (8668, 9335)]