81419980

素因数分解:

$2^2\times 5^1\times {\mathrm{37}}^1\times {\mathrm{47}}^1\times {\mathrm{2341}}^1$

素因数の和:2434

約数の個数: 48

約数和(自身を含む): 179415936

約数和(自身を除く): 97995956

約数列:

[1, 2, 4, 5, 10, 20, 37, 47, 74, 94, 148, 185, 188, 235, 370, 470, 740, 940, 1739, 2341, 3478, 4682, 6956, 8695, 9364, 11705, 17390, 23410, 34780, 46820, 86617, 110027, 173234, 220054, 346468, 433085, 440108, 550135, 866170, 1100270, 1732340, 2200540, 4070999, 8141998, 16283996, 20354995, 40709990, 81419980]

約数ペア:

[(1, 81419980), (2, 40709990), (4, 20354995), (5, 16283996), (10, 8141998), (20, 4070999), (37, 2200540), (47, 1732340), (74, 1100270), (94, 866170), (148, 550135), (185, 440108), (188, 433085), (235, 346468), (370, 220054), (470, 173234), (740, 110027), (940, 86617), (1739, 46820), (2341, 34780), (3478, 23410), (4682, 17390), (6956, 11705), (8695, 9364)]