21446680

素因数分解:

$2^3\times 5^1\times {\mathrm{37}}^1\times {\mathrm{43}}^1\times {\mathrm{337}}^1$

素因数の和:428

約数の個数: 64

約数和(自身を含む): 50862240

約数和(自身を除く): 29415560

約数列:

[1, 2, 4, 5, 8, 10, 20, 37, 40, 43, 74, 86, 148, 172, 185, 215, 296, 337, 344, 370, 430, 674, 740, 860, 1348, 1480, 1591, 1685, 1720, 2696, 3182, 3370, 6364, 6740, 7955, 12469, 12728, 13480, 14491, 15910, 24938, 28982, 31820, 49876, 57964, 62345, 63640, 72455, 99752, 115928, 124690, 144910, 249380, 289820, 498760, 536167, 579640, 1072334, 2144668, 2680835, 4289336, 5361670, 10723340, 21446680]

約数ペア:

[(1, 21446680), (2, 10723340), (4, 5361670), (5, 4289336), (8, 2680835), (10, 2144668), (20, 1072334), (37, 579640), (40, 536167), (43, 498760), (74, 289820), (86, 249380), (148, 144910), (172, 124690), (185, 115928), (215, 99752), (296, 72455), (337, 63640), (344, 62345), (370, 57964), (430, 49876), (674, 31820), (740, 28982), (860, 24938), (1348, 15910), (1480, 14491), (1591, 13480), (1685, 12728), (1720, 12469), (2696, 7955), (3182, 6740), (3370, 6364)]