2148280

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{1249}}^1$

素因数の和:1303

約数の個数: 32

約数和(自身を含む): 4950000

約数和(自身を除く): 2801720

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 172, 215, 344, 430, 860, 1249, 1720, 2498, 4996, 6245, 9992, 12490, 24980, 49960, 53707, 107414, 214828, 268535, 429656, 537070, 1074140, 2148280]

約数ペア:

[(1, 2148280), (2, 1074140), (4, 537070), (5, 429656), (8, 268535), (10, 214828), (20, 107414), (40, 53707), (43, 49960), (86, 24980), (172, 12490), (215, 9992), (344, 6245), (430, 4996), (860, 2498), (1249, 1720)]