208007940

素因数分解:

$2^2\times 3^1\times 5^1\times 7^2\times {\mathrm{139}}^1\times {\mathrm{509}}^1$

素因数の和:674

約数の個数: 144

約数和(自身を含む): 683726400

約数和(自身を除く): 475718460

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 49, 60, 70, 84, 98, 105, 139, 140, 147, 196, 210, 245, 278, 294, 417, 420, 490, 509, 556, 588, 695, 735, 834, 973, 980, 1018, 1390, 1470, 1527, 1668, 1946, 2036, 2085, 2545, 2780, 2919, 2940, 3054, 3563, 3892, 4170, 4865, 5090, 5838, 6108, 6811, 7126, 7635, 8340, 9730, 10180, 10689, 11676, 13622, 14252, 14595, 15270, 17815, 19460, 20433, 21378, 24941, 27244, 29190, 30540, 34055, 35630, 40866, 42756, 49882, 53445, 58380, 68110, 70751, 71260, 74823, 81732, 99764, 102165, 106890, 124705, 136220, 141502, 149646, 204330, 212253, 213780, 249410, 283004, 299292, 353755, 374115, 408660, 424506, 495257, 498820, 707510, 748230, 849012, 990514, 1061265, 1415020, 1485771, 1496460, 1981028, 2122530, 2476285, 2971542, 3466799, 4245060, 4952570, 5943084, 6933598, 7428855, 9905140, 10400397, 13867196, 14857710, 17333995, 20800794, 29715420, 34667990, 41601588, 52001985, 69335980, 104003970, 208007940]

約数ペア:

[(1, 208007940), (2, 104003970), (3, 69335980), (4, 52001985), (5, 41601588), (6, 34667990), (7, 29715420), (10, 20800794), (12, 17333995), (14, 14857710), (15, 13867196), (20, 10400397), (21, 9905140), (28, 7428855), (30, 6933598), (35, 5943084), (42, 4952570), (49, 4245060), (60, 3466799), (70, 2971542), (84, 2476285), (98, 2122530), (105, 1981028), (139, 1496460), (140, 1485771), (147, 1415020), (196, 1061265), (210, 990514), (245, 849012), (278, 748230), (294, 707510), (417, 498820), (420, 495257), (490, 424506), (509, 408660), (556, 374115), (588, 353755), (695, 299292), (735, 283004), (834, 249410), (973, 213780), (980, 212253), (1018, 204330), (1390, 149646), (1470, 141502), (1527, 136220), (1668, 124705), (1946, 106890), (2036, 102165), (2085, 99764), (2545, 81732), (2780, 74823), (2919, 71260), (2940, 70751), (3054, 68110), (3563, 58380), (3892, 53445), (4170, 49882), (4865, 42756), (5090, 40866), (5838, 35630), (6108, 34055), (6811, 30540), (7126, 29190), (7635, 27244), (8340, 24941), (9730, 21378), (10180, 20433), (10689, 19460), (11676, 17815), (13622, 15270), (14252, 14595)]