221448280

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{128749}}^1$

素因数の和:128803

約数の個数: 32

約数和(自身を含む): 509850000

約数和(自身を除く): 288401720

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 172, 215, 344, 430, 860, 1720, 128749, 257498, 514996, 643745, 1029992, 1287490, 2574980, 5149960, 5536207, 11072414, 22144828, 27681035, 44289656, 55362070, 110724140, 221448280]

約数ペア:

[(1, 221448280), (2, 110724140), (4, 55362070), (5, 44289656), (8, 27681035), (10, 22144828), (20, 11072414), (40, 5536207), (43, 5149960), (86, 2574980), (172, 1287490), (215, 1029992), (344, 643745), (430, 514996), (860, 257498), (1720, 128749)]